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Key Performance Parameters (KPPs) specify what the critical performance goals are in a United States Department of Defense (DoD) acquisition under the
Key_Performance_Parameters
Standard for quantifying the results of energy efficiency investments
estimated. Savings are determined by field measurement of all key performance parameters which define the energy use of the ECM-affected system. Typical
International performance measurement and verification protocol
International_performance_measurement_and_verification_protocol
Synchronous electric motor powered by an electronic controller
acceleration, control motor speed and fine-tune efficiency. Two key performance parameters of brushless DC motors are the motor constants K T {\displaystyle
Brushless_DC_electric_motor
Part of the US Department of Defense
which may have joint interest or impact. The JROC also validates key performance parameters. National Security Strategy of the United States National Military
Joint Requirements Oversight Council
Joint_Requirements_Oversight_Council
Statistical law in machine learning
how neural network performance changes as key factors are scaled up or down. These factors typically include the number of parameters, training dataset
Neural_scaling_law
Unmanned reconnaissance and strike aircraft system
concluded the Gray Eagle was meeting only four out of seven "key performance parameters," and its reliability fell short of predicted growth. 11 unplanned
General Atomics MQ-1C Gray Eagle
General_Atomics_MQ-1C_Gray_Eagle
British propeller-driven large airliner prototype
led by L. G. Frise and Archibald Russell, worked with several key performance parameters. Those included a range of 5,000 mi (8,000 km), 225 ft (69 m)
Bristol_Brabazon
Telecommunications performance metric
In electromagnetics, an antenna's gain is a key performance parameter which combines the antenna's directivity and radiation efficiency. The term power
Gain_(antenna)
US DoD process
organizational responsibilities. The JCIDS Manual defines performance attributes, key performance parameters, validation and approval processes, and associated
Joint Capabilities Integration and Development System
Joint_Capabilities_Integration_and_Development_System
Condition that must be satisfied for an engineered work to be acceptable
cost. enthusiasm ca. 1998 for 'Net-Ready' led to its mandate as Key Performance Parameter from the Net-Ready office, outside the office defining requirements
Requirement
French artificial intelligence company
active parameters and 675 billion total parameters, and Ministral 3, three small, dense models with 3 billion, 7 billion and 14 billion parameters. On 10
Mistral_AI
Function that derives secret keys from a secret value
conjunction with non-secret parameters to derive one or more keys from a common secret value (which is sometimes also referred to as "key diversification"). Such
Key_derivation_function
Topics referred to by the same term
Protection, a security feature of Microsoft Windows Key Performance Parameters, convey critical performance goals in JCIDS Kinetic PreProcessor, an open-source
KPP
Measurement of the actual versus predicted uptime of a system
military acquisition, operational availability is used as one of the Key Performance Parameters in requirements documents, to form the basis for decision support
Operational_availability
Spectrograph on the James Webb Space Telescope
IFU aperture (IFU-mode) or the slits (SLIT mode). The NIRSpec key performance parameters are: . NIRSpec has been built by Astrium Germany with subcontractors
NIRSpec
demonstration needs. An AoA begins by establishing or modifying Key Performance Parameters (KPPs) metrics for each alternative. These metrics help compare
Analysis_of_Alternatives
Type of insulated glazing
Gao, Tao; Time, Berit (2016). Multilayer Glazing Technologies: Key Performance Parameters and Future Perspectives. Aalborg, Denmark: CLIMA 2016 - Proceedings
Quadruple_glazing
Measure of surface finish or texture
Ra} . Other common parameters include R z {\displaystyle Rz} , R q {\displaystyle Rq} , and R s k {\displaystyle Rsk} . Some parameters are used only in
Surface_roughness
Process of collecting, analyzing and/or reporting information regarding performance
in the US defined it using a more evaluative focus—"Performance measurement estimates the parameters under which programs, investments, and acquisitions
Performance_measurement
Mechanism to make parity between cars in auto racing
balance of performance (BoP) is a regulation and mechanism that maintains parity between competing vehicles by adjusting the limits and parameters of a vehicle
Balance_of_performance
Technical specification for remote management protocol
single key named Device or InternetGatewayDevice depending on the manufacturer's choice. At each level of the structure objects and parameters (or array-instances)
TR-069
Performing in public places for gratuities or to be seen only
lockdowns, but predates this. The place where a performance occurs is called a "pitch". A good pitch can be the key to success as a busker. An act that might
Street_performance
Enterprise architecture framework
specifies the current performance parameters of each system, interface, or system function, and the expected or required performance parameters at specified times
Department of Defense Architecture Framework
Department_of_Defense_Architecture_Framework
Large language model by Meta AI
AI reported the 13B parameter model performance on most NLP benchmarks exceeded that of the much larger GPT-3 (with 175B parameters), and the largest 65B
Llama_(language_model)
tasks such as language generation. LLMs are language models with many parameters, and are trained with self-supervised learning on a vast amount of text
List_of_large_language_models
Testing performance under a given workload
are observed. The below parameters are usually monitored during the a performance test execution Server hardware Parameters CPU Utilization Memory Utilization
Software_performance_testing
Eight voice polyphonic analog synthesizer
various aspects of sound production, including key assignment modes, modulation routing, and envelope parameters. Any polyphonic instrument must use an algorithm
Voyetra-8
Encompasses the techniques applied during a systems development life cycle
within the parameters of the non functional performance requirements. Java performance Scalability Software quality Software testing Web performance "Banking
Performance_engineering
Roadable aircraft
sufficient flight performance and range, while carrying a payload that was representative of four troops with gear. Key performance parameters were specified
Aerial Reconfigurable Embedded System
Aerial_Reconfigurable_Embedded_System
Type of machine learning model
bytes, and so one billion parameters require 2 gigabytes. The largest models typically have more than 100 billion parameters, which places them outside
Large_language_model
Series of language models developed by Google AI
language at two model sizes, BERTBASE (110 million parameters) and BERTLARGE (340 million parameters). Both were trained on the Toronto BookCorpus (800M
BERT_(language_model)
American or British counterparts. The following table shows some key performance parameters for Japanese aircraft carriers. Carriers are listed in order of
Design and capability of aircraft carriers during World War II
Design_and_capability_of_aircraft_carriers_during_World_War_II
Part of a URL that assigns values to specified parameters
for parsing multiple parameters in the query string, separated by some delimiter. In the example URL below, multiple query parameters are separated by the
Query_string
US/British armored reconnaissance vehicle
Retrieved 16 February 2022. Winograd, Erin Q. (22 March 1999). "Key Performance Parameters Relaxed: Contract Adjustments for Future Scout Satisfy U.S., British
Future Scout and Cavalry System/TRACER
Future_Scout_and_Cavalry_System/TRACER
Cryptographic protocols for securing data in transit
ephemeral Diffie–Hellman (DHE) key exchange to support forward secrecy were using weak Diffie–Hellman parameters. These weak parameter choices could potentially
Transport_Layer_Security
Algorithm for public-key cryptography
The RSA (Rivest–Shamir–Adleman) cryptosystem is a family of public-key cryptosystems (one of the oldest), widely used for secure data transmission. The
RSA_cryptosystem
the Milestone B decisions and contains parameters for the program such as key cost, schedule, and performance goals. Cochrane, C. B. (July 2004). Joint
Acquisition_Program_Baseline
Open source 3D printer software
interface for the connected printers. It displays printers' status and key parameters and allows users to schedule prints and remotely control the printer
OctoPrint
Tasks in machine learning
algorithm being used, the parameters of the model are adjusted. The model fitting can include both variable selection and parameter estimation. Successively
Training, validation, and test data sets
Training,_validation,_and_test_data_sets
Control loop feedback mechanism
by gain scheduling (using different parameters in different operating regions). If the PID controller parameters (the gains of the proportional, integral
PID_controller
Measurement of risk in a portfolio
a model to the observed yield curve with a limited number of parameters. These parameters can then be translated into shift, twist, and butterfly movements
Fixed-income_attribution
1976 studio album by Stevie Wonder
Songs in the Key of Life is the eighteenth studio album by the American singer, songwriter and musician Stevie Wonder. A triple album, it was released
Songs_in_the_Key_of_Life
completeRow(key, value, params); } } But without the listener, it becomes an example of the antipattern: // parse a key, a value, then three parameters String
Loop-switch_sequence
American semiconductor company
wafer trained models with up to 20 billion parameters. The Cerebras CS-2 system can train multibillion-parameter natural-language-processing (NLP) models
Cerebras_Systems
Chinese artificial intelligence company
DeepSeek's models are described as "open-weight", meaning the exact parameters are openly shared, but the training data is not openly licensed. Since
DeepSeek
Method used for display options on video text terminals
and no parameters at all in ESC[m acts like a 0 reset code). Some sequences (such as CUU) treat 0 as 1 in order to make missing parameters useful. A
ANSI_escape_code
Lattice-based public key cryptosystem
public key h contains both f and g one can try to obtain them from h. It is however too hard to find the secret key when the NTRUEncrypt parameters are chosen
NTRUEncrypt
Chinese artificial intelligence company
model with 1 trillion total parameters. The model uses a mixture-of-experts (MoE) architecture, where 32 billion parameters are active during inference
Moonshot_AI
1970 British film by Donald Cammell and Nicolas Roeg
Performance is a 1970 British crime drama film directed by Donald Cammell and Nicolas Roeg, written by Cammell and filmed by Roeg. The film stars James
Performance_(film)
Image-generating machine learning model
for training and generation as an advantage of LDMs. With 860 million parameters in the U-Net and 123 million in the text encoder, Stable Diffusion is
Stable_Diffusion
American professional football club based in Los Angeles
Retrieved May 15, 2018. Lutz, Tom (March 31, 2018). "Zlatan Ibrahimovic's low-key MLS debut: a wondergoal then the winner for LA Galaxy". The Guardian. Retrieved
Los_Angeles_FC
Degree of interdependence between software modules
input data parameters c i {\displaystyle c_{i}} : number of input control parameters d o {\displaystyle d_{o}} : number of output data parameters c o {\displaystyle
Coupling (computer programming)
Coupling_(computer_programming)
Programming language and superset of JavaScript
additions like tuples in rest parameters and spread expressions, rest parameters with tuple types, generic rest parameters and so on. TypeScript 4.0 was
TypeScript
Connection standard for electronic musical instruments
are examples of synthesizer parameters, and can be controlled remotely through MIDI. Effects devices have different parameters, such as delay feedback or
MIDI
Structure in data warehousing
This contrasts with a rapidly changing dimension, such as transactional parameters like customer ID, product ID, quantity, and price, which undergo frequent
Slowly_changing_dimension
conversion tracking is the measurement of media performance with reference to campaign key performance indicators (KPIs). This process functions thanks
Conversion_tracking
Simulation of physical processes taking place in an electronic device
network parameter sets may be used to model a transistor. These include: Transmission parameters (T-parameters), Hybrid-parameters (h-parameters), Impedance
Transistor_model
2017 research paper by Google
achieved SOTA result in textual entailment with an order of magnitude fewer parameters than LSTMs. One of its authors, Jakob Uszkoreit, suspected that attention
Attention_Is_All_You_Need
Measure of how well a manufacturing operation is utilized
particular Time frame, Shift, Team or any of several other parameters. Although the performance of a particular product can be determined from OEE data,
Overall equipment effectiveness
Overall_equipment_effectiveness
Cryptography secured against quantum computers
Singh presents a set of parameters which have 6956-bit public keys for the Peikert's scheme. The corresponding private key would be roughly 14,000 bits
Post-quantum_cryptography
1994 original video animation anime series directed by Hiroaki Sato
Key the Metal Idol (キィ・ザ・メタル・アイドル, Kii Za Metaru Aidoru) is a Japanese original video animation (OVA) series that was released from December 1994 to June
Key_the_Metal_Idol
Fitness for purpose of textiles
PPE) require a different set of performance parameters. As a result, the specifications determine the level of performance of a textile product. Textile
Textile_performance
Double-reed woodwind instrument
thumb keys; the D2 and bottom key above the whisper key on the tenor joint (C♯ key) together create both C♯3 and C♯4. The same bottom tenor-joint key is
Bassoon
System that powers a motor vehicle
flatness, waviness, roughness, and porosity. Quality control over these parameters is achieved through metrology technology applied to all of the steps in
Powertrain
Large language model developed by Google
"Pathways Language Model (PaLM): Scaling to 540 Billion Parameters for Breakthrough Performance". ai.googleblog.com. Retrieved 17 March 2023. Chowdhery
PaLM
Standard for MIDI-based music synthesizers
Parameter Number or RPN. Registered Parameters are usually called RPNs for short. Setting Registered Parameters requires sending (numbers are decimal):
General_MIDI
Database class for storage and retrieval of modeled data
overview" (PDF). Marc Seeger. Retrieved 1 January 2012. Key–value stores provide a high-performance alternative to relational database systems with respect
NoSQL
2024 film by Halina Reijn
Dickinson on Filming Kinky Sex Scenes With Nicole Kidman: 'We Set the Parameters'". Variety. Archived from the original on October 23, 2024. Retrieved
Babygirl
Standardized way to automatically access information about a memory module
dropped; now there are just a single set of timing parameters. Revision 1.1 lets some parameters be expressed as a "medium time base" value plus a (signed
Serial_presence_detect
Network that allows computers to share resources and communicate with each other
less than a microsecond to several hundred milliseconds. The parameters that affect performance typically can include throughput, jitter, bit error rate and
Computer_network
Artificial intelligence model paradigm
000 parameters, is applicable across a wide range of contexts, and exhibits, or could be easily modified to exhibit, high levels of performance at tasks
Foundation_model
Plug-in hybrid full-size luxury SUV
interior Chen, Dong Yi (8 January 2026). "Zeekr 8X plug-in hybrid SUV key parameters exposed: 275 hp 2.0T engine, 70 kWh battery, 5.1 meters length". CarNewsChina
Zeekr_8X
Hash function without any collisions
function is in O(n) where n is the number of keys in the structure. The important performance parameters for perfect hash functions are the evaluation
Perfect_hash_function
Secure network protocol suite
BLAKE2 or SHA256. These parameters are agreed for the particular session, for which a lifetime must be agreed and a session key. The algorithm for authentication
IPsec
Family of large language models by Alibaba
billion and 7 billion parameters. In January 2025, Qwen2.5-VL was released with variants of 3, 7, 32, and 72 billion parameters. All models except the
Qwen
Language model by DeepMind
contains six models of increasing size, from 44 million parameters to 280 billion parameters. They refer to the largest one as "Gopher" by default. Similar
Chinchilla_(language_model)
Official commitment between a service provider and a customer
encompasses the SLA contract definition: the basic schema with the QoS parameters; SLA negotiation; SLA monitoring; SLA violation detection; and SLA enforcement—according
Service-level_agreement
Influential 2012 deep convolutional neural network
million parameters and 650,000 neurons. The original paper's primary result was that the depth of the model was essential for its high performance, which
AlexNet
English actress (born 1985)
Actress. Mulligan received further Academy Award nominations for her performances in the black comedy Promising Young Woman (2020) and the biopic Maestro
Carey_Mulligan
Pistol cartridge designed by John Moses Browning
190 to 294 ft⋅lbf (258 to 399 J). The table below shows common performance parameters for several .380 ACP loads. Bullet weights ranging from 85 to 95 gr
.380_ACP
Artwork created through actions of an artist or other participants
decade the parameters and technicalities built to purify and perfect performance art were defined. Despite the fact that many performances are held within
Performance_art
Indian actor and racing driver (born 1971)
Season still in progress. (key) (key) (key) (Races in bold indicate pole position) (Races in italics indicate fastest lap) (key) (Races in bold indicate
Ajith_Kumar
Block cipher
importance of encryption speed, memory usage, hardware gate count, key setup and other parameters. This allows a highly flexible algorithm, which can be implemented
Twofish
Applies an electric current to heat or cool materials
the key importance in the direction of new zero emissions passive building because of a very high COP value and the following high performances by an
Thermoelectric_heat_pump
Measurement indicator of fuel conversion
A jet engine converts fuel into thrust. One key metric of performance is the thermal efficiency; how much of the chemical energy (fuel) is turned into
Jet_engine_performance
Algorithm for modelling sequential data
achieved SOTA result in textual entailment with an order of magnitude fewer parameters than LSTMs. One of its authors, Jakob Uszkoreit, suspected that attention
Transformer_(deep_learning)
Key element of a service-level agreement
of the service in a given period" with respect to the state of the SLA parameters. Keller and Ludwig go on to state that while service providers will most
Service-level_objective
Large biological molecule that acts as a catalyst
total amount of enzyme. Vmax is only one of several important kinetic parameters. The amount of substrate needed to achieve a given rate of reaction is
Enzyme
English actress (born 1986)
requiring her to perform a nude scene. The production, along with her performance, received mixed reviews from critics. Later that year, she also starred
Emilia_Clarke
Low-level programming language family
embedded debugging code via parameters and other similar features. Macro assemblers often allow macros to take parameters. Some assemblers include quite
Assembly_language
Mapping arbitrary data to fixed-size values
worst-case performance, good performance under high table loading factors, and in special cases, perfect (collisionless) mapping of keys into hash codes
Hash_function
Synthesizer
The Ensoniq VFX is a performance-type synthesizer released in 1989. It was soon followed by the release of the VFX-SD, which included some updated waveforms
Ensoniq_VFX
Composer and musician (1756–1791)
never cease to be music, I have gone from F (the key in which the aria is written) not into a remote key, but into a related one, not however, into the
Wolfgang_Amadeus_Mozart
Kerala affiliate of the Bharatiya Janata Party
Gram Panchayats across multiple districts, strengthening its presence in key municipalities like Palakkad and Thrippunithura, and signaling the rise of
Bharatiya Janata Party – Kerala
Bharatiya_Janata_Party_–_Kerala
Upcoming video game
includes Vice City, Grassrivers, and the Leonida Keys, based on Miami, the Everglades, and the Florida Keys, respectively; as well as Ambrosia, Mount Kalaga
Grand_Theft_Auto_VI
Process scheduler in Linux
interactions of multiple parameters with each other, and claimed that the use of such tuning parameters could often result in improved performance in a specific
Brain_Fuck_Scheduler
Electronic keyboard supported by a strap around shoulders like a guitar
45 velocity sensitive keys (without aftertouch), and a 3-character LED display. Several features aimed towards stage performance are present, such as a
Keytar
1971 studio album by the Rolling Stones
Dutch). Hung Medien. Retrieved 17 June 2015. ERROR in "Czech": Missing parameters: week, year. "ČNS IFPI – CZ Albums – Top 100 – {week}. týden {year}" (in
Sticky_Fingers
Physical process of transition between basic states of matter
and ferromagnetic, can have order parameters for more than one degree of freedom. In such phases, the order parameter may take the form of a complex number
Phase_transition
Iterative decision analytic framework
actions to consequences or the prior probability distributions for the key input parameters to those models. A wide variety of concepts, methods, and tools have
Robust_decision-making
KEY PERFORMANCE-PARAMETERS
KEY PERFORMANCE-PARAMETERS
Surname or Lastname
English and German
English and German : variant of Kay.Irish : reduced form of McKay.
Surname or Lastname
English
English : unexplained; possibly a respelling of Kay 6, a shortened form of Scottish and Irish McKay.Korean : There is only one Chinese character and one clan for the Kye family name. According to the Kye family genealogy, the clan was founded by a Ming Dynasty government official named Kye SÅk-son who migrated to KoryÅ and settled in today’s Suan County of Hwanghae Province. The majority of bearers of the Kye family name today live in North Korea.
Girl/Female
Tamil
Performance
Boy/Male
Hindu, Indian, Traditional
Conduct; Regular Performance of Worship
Boy/Male
Indian, Modern
Good Performance; Good Person
Boy/Male
Indian
Key
Surname or Lastname
English
English : nickname from Middle English ca ‘jackdaw’, from an unattested Old Norse ká. See also Daw.English : nickname from Middle English cai, kay, kei ‘left-handed’, ‘clumsy’.English : metonymic occupational name for a locksmith, from Middle English keye, kaye ‘key’. Compare Care, Kear.English : topographic name for someone living on or near a quay, Middle English kay(e), Old French cay.English : from a Middle English personal name which figures in Arthurian legend. It is found in Old Welsh as Cai, Middle Welsh Kei, and is ultimately from the Latin personal name Gaius.Scottish and Irish : reduced form of McKay.French : variant of Quay, cognate with 2.Much shortened form of any of various names, mostly Eastern European, beginning with the letter K-.Variant of Danish and Frisian Kai.
Boy/Male
Bengali, English, Indian, Sindhi
Key
Boy/Male
Muslim/Islamic
Key
Male
Turkish
Turkish name GÖKER means "man of the sky."
Boy/Male
Muslim
Key
Boy/Male
Christian, Gaelic, Indian
The One who Opens the Lock
Male
Greek
(Κήυξ) Greek name, possibly KEYX means "kingfisher." In mythology, this is the name of a king of Thessaly, the son of Eosphoros.
Male
English
Short form of English Kenneth, KEN means both "born of fire" and "comely; finely made." Also used as a nickname for other names that begin with Ken-. Compare with another form of Ken.
Surname or Lastname
English and Scottish
English and Scottish : variant of Kay.
Male
Japanese
(1-å¥, 2-謙, 3-ç ”) Japanese name KEN means 1) "healthy, strong" or 2) "modest," or 3) "study." Compare with another form of Ken.
Boy/Male
Gaelic
Son of Aidan.
Boy/Male
Indian, Sanskrit, Tamil
Key; Love
Girl/Female
Gujarati, Hindu, Indian, Kannada, Marathi, Sanskrit, Sindhi, Tamil, Telugu
Performance
Girl/Female
American, British, Chinese, Dutch, English, Finnish, French, German, Greek, Hebrew, Latin, Scandinavian
Rejoiced; Short Form of Katherine and Other Names Beginning with K; Happy; Pure; Clear; Form of Katherine; Virginal; Keeper of the Keys; Elder Sister
KEY PERFORMANCE-PARAMETERS
KEY PERFORMANCE-PARAMETERS
Surname or Lastname
English, of Welsh origin
English, of Welsh origin : Anglicized form of Welsh ap Ble(i)ddyn (see Blethen), with the addition of the English patronymic suffix -s.
Boy/Male
Muslim
Lynx, Panther
Girl/Female
German, Greek, Swedish
Pure
Female
Yiddish
(פרוּמָ×) Yiddish name FRUMA means "pious one."
Boy/Male
Sikh
A life filled with happiness, Prosperity
Girl/Female
Gujarati, Hindu, Indian, Kannada, Telugu
Worshiper of One's Ideal Person; Cute
Girl/Female
Christian, German
Noble; Kind; Noble Sort
Girl/Female
Hindu
Goddess Lakshmi
Girl/Female
Slavic Russian
Great.
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Protector of All; Lord Krishna
KEY PERFORMANCE-PARAMETERS
KEY PERFORMANCE-PARAMETERS
KEY PERFORMANCE-PARAMETERS
KEY PERFORMANCE-PARAMETERS
KEY PERFORMANCE-PARAMETERS
n.
The act of performing; the carrying into execution or action; execution; achievement; accomplishment; representation by action; as, the performance of an undertaking of a duty.
n.
A key or scale closely related to another as principal; a relative or attendant key. [R.] See Attendant keys, under Attendant, a.
v. t.
To fasten or secure firmly; to fasten or tighten with keys or wedges.
a.
Furnished with keys; as, a keyed instrument; also, set to a key, as a tune.
v. t.
To form a key seat, as by cutting. See Key seat, under Key.
n.
An indehiscent, one-seeded fruit furnished with a wing, as the fruit of the ash and maple; a samara; -- called also key fruit.
p. pr. & vb. n.
of Key
n.
A key for opening more locks than one; a master key.
n.
Fact; performance.
imp. & p. p.
of Key
n.
That part of an instrument or machine which serves as the means of operating it; as, a telegraph key; the keys of a pianoforte, or of a typewriter.
n.
That which is performed or accomplished; a thing done or carried through; an achievement; a deed; an act; a feat; esp., an action of an elaborate or public character.
n. pl.
See Kie, Ky, and Kine.
n.
A family of tones whose regular members are called diatonic tones, and named key tone (or tonic) or one (or eight), mediant or three, dominant or five, subdominant or four, submediant or six, supertonic or two, and subtonic or seven. Chromatic tones are temporary members of a key, under such names as " sharp four," "flat seven," etc. Scales and tunes of every variety are made from the tones of a key.
n.
A position or condition which affords entrance, control, pr possession, etc.; as, the key of a line of defense; the key of a country; the key of a political situation. Hence, that which serves to unlock, open, discover, or solve something unknown or difficult; as, the key to a riddle; the key to a problem.
n.
See Key, a ledge.
n.
See Key way, under Key.
n.
A latch key.
a.
Cold as a metallic key; lifeless.
n.
An instrument which is turned like a key in fastening or adjusting any mechanism; as, a watch key; a bed key, etc.