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Electro-mechanical data storage device
A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical computer data storage device that stores and retrieves digital
Hard_disk_drive
engineers at IBM's San Jose California laboratory invented the hard disk drive. The disk drive created a new level in the computer data hierarchy, then termed
History_of_hard_disk_drives
Computer bus used for data storage systems
Hard disk drives are accessed over one of a number of bus types, including parallel ATA (PATA, also called IDE or EIDE; described before the introduction
Hard_disk_drive_interface
Circular disk on which magnetic data is stored in a hard disk drive
A hard disk drive platter or hard disk is the circular magnetic disk on which digital data is stored in a hard disk drive. The rigid nature of the platters
Hard_disk_drive_platter
Electromechanical malfunctioning
A hard disk drive failure occurs when a hard disk drive malfunctions and the stored information cannot be accessed with a properly configured computer
Hard_disk_drive_failure
Brand of hard disk drives by Western Digital
performance 3.5-inch hard disk drives (HDDs) and solid-state drives (SSDs) and formerly 10000 and 15000RPM 2.5 mission critical enterprise drives. The brand was
Ultrastar_(hard_disk_drive)
Higher performance in hard disk drives comes from devices which have better performance characteristics. These performance characteristics can be grouped
Hard disk drive performance characteristics
Hard_disk_drive_performance_characteristics
Since the invention of the floppy disk drive, various standardized form factors have been used in computing systems. Standardized form factors and interface
List of disk drive form factors
List_of_disk_drive_form_factors
Computer storage device with no moving parts
solid-state disk. Etymologically, "solid-state drive" partly refers to existing data storage devices like tape drives and hard disk drives, which all used
Solid-state_drive
General category of storage mechanisms
changes to the disk's surface layer. A disk drive is a device implementing such a storage mechanism. Notable types are hard disk drives (HDD), containing
Disk_storage
Creation of accessible areas on secondary storage device
segmentation of a disk drive was IBM's 1966 usage in its CP-67 operating system of minidisk as a separate segment of a hard disk drive. Data General's RDOS
Disk_partitioning
Hard disk monitoring software
Hard Disk Sentinel (HDSentinel) is a computer hard disk drive-monitoring software for Windows, Linux and DOS operating systems. Hard Disk Sentinel was
Hard_Disk_Sentinel
magnetic disk storage devices from 1956 to 2003, when it sold its hard disk drive business to Hitachi. Both the hard disk drive (HDD) and floppy disk drive (FDD)
History of IBM magnetic disk drives
History_of_IBM_magnetic_disk_drives
Computer file consisting of the contents of a storage device
copy of every storage location of a device (i.e. every sector of a hard disk drive), but it is now common to only store allocated data to reduce storage
Disk_image
Specialized casing
A disk enclosure or desktop hard drive is a specialized casing designed to hold and power hard disk drives or solid-state drives while providing a mechanism
Disk_enclosure
Removable cartridge disk storage system
The Zip drive is a discontinued removable cartridge disk storage system sold by Iomega from 1995 to 2003. Considered medium-to-high-capacity at the time
Zip_drive
Adapted (FATA) or FC-ATA is a type of computer hard disk drive. FATA is simply a low cost ATA or SATA disk drive equipped with a small external converter that
FATA_(hard_disk_drive)
Monitoring system in computer drives
in computer hard disk drives (HDDs) and solid-state drives (SSDs). Its primary function is to detect and report various indicators of drive reliability
Self-Monitoring, Analysis and Reporting Technology
Self-Monitoring,_Analysis_and_Reporting_Technology
Small, movable part of a disk drive
A disk read-and-write head is the small part of a disk drive that moves above the disk platter and transforms the platter's magnetic field into electric
Disk_read-and-write_head
Data storage device
combines a faster storage medium such as solid-state drive (SSD) with a higher-capacity hard disk drive (HDD). The intent is adding some of the speed of SSDs
Hybrid_drive
At least 218 companies have manufactured hard disk drives (HDDs) since 1956. Most of that industry has vanished through bankruptcy or mergers and acquisitions
List of defunct hard disk manufacturers
List_of_defunct_hard_disk_manufacturers
American data storage company
in 1970, the company is one of the world's largest manufacturers of hard disk drives (HDDs). Western Digital logo history Western Digital was founded on
Western_Digital
Data storage device
hard drives are usually larger and heavier than flash drives; however, hard disks sometimes weigh less per unit of storage. Like flash drives, hard disks
USB_flash_drive
Process of preparing a data storage device for initial use
Disk formatting is the process of preparing a data storage device such as a hard disk drive, solid-state drive, floppy disk, memory card or USB flash
Disk_formatting
Buffer between a computer and a storage disk
storage, a disk buffer (often ambiguously called a disk cache or a cache buffer) is the embedded memory in a hard disk drive (HDD) or solid-state drive (SSD)
Disk_buffer
Cryptographic hardware
Hardware-based full disk encryption (FDE) is available from many hard disk drive (HDD/SSD) vendors, including Kingston Technology, Integral Memory, iStorage
Hardware-based full disk encryption
Hardware-based_full_disk_encryption
Data storage device
stability. A tape drive provides sequential access storage, unlike a hard disk drive, which provides direct access storage. A disk drive can move to any
Tape_drive
Topics referred to by the same term
Look up hard drive, harddrive, or hard disk drive in Wiktionary, the free dictionary. A hard disk drive is a computer storage device containing rigid
Hard_Drive
Hard drive by Apple
The Apple Hard Disk 20SC is Apple's first SCSI based hard drive for the Apple II family as well as the Macintosh and other third party computers using
Hard_Disk_20SC
One-inch hard disk format by IBM and Hitachi
The Microdrive was a miniature, one-inch hard disk drive released in 1998 by IBM. The idea was originally created in 1992 by Timothy J. Riley and Thomas
Microdrive
Logical or physical division of storage media
fixed amount of user-accessible data, traditionally 512 bytes for hard disk drives (HDDs), and 2048 bytes for CD-ROMs, DVD-ROMs and BD-ROMs. Newer HDDs
Disk_sector
Type of data storage
always-on spinning hard disk drives are online storage, while spinning drives that spin down automatically, such as in Massive Arrays of Idle Disks (MAID), are
Nearline_storage
First Macintosh hard drive developed by Apple
The Macintosh Hard Disk 20 is the first hard drive developed by Apple Computer specifically for use with the Macintosh 512K. Introduced on September 17
Hard_Disk_20
Process of duplicating all data on a digital storage drive
Disk cloning is the process of duplicating all data on a digital storage drive, such as a hard disk or solid state drive, using hardware or software techniques
Disk_cloning
external hard disk drive manufacturers: ADATA Buffalo Technology Freecom G-Technology (brand of Western Digital) Hyundai IoSafe-Hard drive safes LaCie
List of computer hardware manufacturers
List_of_computer_hardware_manufacturers
Method of overwriting data
that aims to completely destroy all electronic data residing on a hard disk drive or other digital media by overwriting data onto all sectors of the
Data_erasure
3.5" drive bay for the PlayStation 2
model 70000). The bay is designed for the network adaptor and internal hard disk drive (HDD). These peripherals enhance the capabilities of the PS2 to allow
PlayStation_2_Expansion_Bay
Computer storage interface standard
hard drives and CD or DVD drives. The connection is used for computer storage such as hard disks, high-capacity floppy disk variants, optical disks,
Parallel_ATA
Obsolete form of removable media
of hard disk platters (circular, rigid discs coated with a magnetic data storage surface). A disk pack is the core component of a hard disk drive. In
Disk_pack
Process of salvaging inaccessible data from corrupted or damaged secondary storage
storage media such as internal or external hard disk drives (HDDs), solid-state drives (SSDs), USB flash drives, magnetic tapes, CDs, DVDs, RAID subsystems
Data_recovery
Computing term that indicates storage failure
failure mode of Zip drives sold by Iomega, appearing in print as early as January 30, 1998. Usage in the context of a hard disk drive appeared by February
Click_of_death
Data storage technology
storing all data in a single hard disk drive or solid-state drive, RAID coordinates two or more such devices into a disk array. When the computer writes
RAID
Way to specify the location of data on computer storage devices
computer storage devices, generally secondary storage systems such as hard disk drives. LBA is a particularly simple linear addressing scheme; blocks are
Logical_block_addressing
Techniques for using multiple disk drives that do not use RAID
widespread standard for configuring multiple hard disk drives is RAID (redundant array of inexpensive/independent disks), which comes in a number of standard
Non-RAID_drive_architectures
1982–2006 American hard disk drive manufacturer
Corporation was an American computer hard disk drive manufacturer. Founded in 1982, it was the third largest hard disk drive manufacturer in the world before
Maxtor
Technology for maintenance of file systems
on electromechanical disk drives (hard disk drives, floppy disk drives and optical disk media). The movement of the hard drive's read/write heads over
Defragmentation
Removable disk storage medium
dust from the spinning disk. Floppy disks store digital data, which can be read or written when inserted into a floppy disk drive (FDD) connected to or
Floppy_disk
Specialised hard disk controller for forensic usage
fits between a computer and an IDE or SCSI hard drive, but with the advent of USB and SATA, forensic disk controllers supporting these newer technologies
Forensic_disk_controller
Storage of digital data readable by computers
CPU and storage further away. In modern computers, hard disk drives (HDDs) or solid-state drives (SSDs) are usually used as storage. A modern digital
Computer_data_storage
Software components that emulate an actual disk storage device
Virtual disk and virtual drive are software components that emulate an actual disk storage device. Virtual disks and virtual drives are common components
Virtual disk and virtual drive
Virtual_disk_and_virtual_drive
RAM used to emulate secondary storage
software treats as if the memory were a hard disk drive or solid-state drive (secondary storage). RAM drives provide high-performance temporary storage
RAM_drive
rectangular plastic carrier. It is read and written using a floppy disk drive (FDD). Floppy disks were an almost universal data format from the 1970s into the
History_of_the_floppy_disk
Major floods in Thailand
affected regional automobile production and caused a global shortage of hard disk drives which lasted throughout 2012. The World Bank's estimate for this disaster
2011_Thailand_floods
Defunct American data storage company
hard disk drive manufacturer company that was headquartered in Sunnyvale, California. It designed and manufactured low-cost 3.5-in hard disk drives for
Kalok
American data storage company
California, United States. Seagate developed the first 5.25-inch hard disk drive (HDD), the 5-megabyte ST-506, in 1980. They were a major supplier in
Seagate_Technology
Controller for disk storage, usually integrated into the drive
A disk controller is a controller circuit that enables a CPU to communicate with a hard disk, floppy disk or other kind of disk drive. It also provides
Disk_controller
Standard-sized area for adding drives or other hardware to a computer
used for hard disk drives and floppy disk drives. This form factor is obsolete, a famous example being the Shugart SA1000 winchester drive. Later models
Drive_bay
solid-state drives (SSDs) for computers and other electronic devices that require data storage. In the list those manufacturers that also produce hard disk drives
List of solid-state drive manufacturers
List_of_solid-state_drive_manufacturers
when vertical (left side when horizontal) to which a custom-housed hard disk drive unit can be attached in sizes of 5e either 20, 60, 120, 250, 320, 500 GB;
Xbox 360 technical specifications
Xbox_360_technical_specifications
Alphabetical assignment to logical drives on computers (e.g., C:\)
hard disk drive (DOS versions prior to 5.0 will probe for only two physical hard disks, whereas DOS 5.0 and higher support eight physical hard disks)
Drive_letter_assignment
Data recovery utility by Cleverfiles
deleted or lost files from hard disk drives, USB flash drives and SSD drives with the help of Recovery Vault technology. While Disk Drill was originally exclusive
Disk_Drill
Memory card format
later made by Hitachi, implements the CF Type II interface, but is a hard disk drive (HDD) as opposed to solid-state memory. Seagate also made CF HDDs.
CompactFlash
Scratch space is space on the hard disk drive that is dedicated for storage of temporary user data, by analogy of "scratch paper." It is unreliable by
Scratch_space
File format representing a virtual hard disk drive
VHD (Virtual Hard Disk) and its successor VHDX are file formats representing a virtual hard disk drive (HDD). They may contain what is found on a physical
VHD_(file_format)
Probability that a device or component will fail during a year of use
unit. For example, AFR is used to characterize the reliability of hard disk drives. The relationship between AFR and MTBF (in hours) is: AFR = 1 − exp
Annualized_failure_rate
Data security technology
of disk encryption solutions have support for TPM. These implementations can wrap the decryption key using the TPM, thus tying the hard disk drive (HDD)
Disk_encryption
Hard disk drive introduced by Hewlett-Packard on June 9th, 1992
The Hewlett-Packard HP3013/3014, nicknamed Kittyhawk, was a hard disk drive introduced by Hewlett-Packard on June 9, 1992. Developed with assistance from
HP_Kittyhawk
Topics referred to by the same term
Disk cache may refer to: Disk buffer, the small amount of RAM embedded on a hard disk drive, used to store the data going to and coming from the disk
Disk_cache
Professional computer backup device
The Jaz drive is a removable hard disk storage system sold by the Iomega company from 1996 to 2002. Following the success of the Iomega Zip drive, which
Jaz_drive
American digital storage corporation
requiring external power. In 1991, SunDisk produced the first flash-based solid-state drive (SSD) in a 2.5-inch hard disk drive form factor for IBM with a 20
Sandisk
Association of a drive letter with a shared network storage location
drive has been mapped, applications on the client computer can read and write files on the remote storage as if it were a locally attached hard disk drive
Drive_mapping
installation of various hard drives (Ultra/Super IDE/Parallel ATA) in computers that have older BIOS chips that do not recognize hard disk drives larger than 137
Dynamic_drive_overlay
Computer drive that uses removable MO media
they normally appear as hard disk drives to an operating system and can be formatted with any file system. Magneto-optical drives were common in some countries
Magneto-optical_drive
Defunct American storage equipment manufacturer
entrant into the hard disk drive market for personal computers. Its earliest products were the SQ306R, a 5 MB 3.9" (100 mm) cartridge disk drive and associated
SyQuest_Technology
Personal computer by Apple Inc.
interest in the Lisa, even though it had superior hardware (including hard disk drive support, up to 2 megabytes (MB) of RAM expansion slots, and a larger
Apple_Lisa
Recording of data on a magnetizable medium
field. In older hard disk drive (HDD) designs the regions were oriented horizontally and parallel to the disk surface, but for newer disks, the orientation
Magnetic_storage
Complete, bootable computer installation that runs directly from a CD-ROM
storage device into a computer's memory, rather than loading from a hard disk drive. A live CD allows users to run an operating system for any purpose
Live_CD
Recording of information in a storage medium
drives such as hard disk drives (HDDs), magnetic tape drives, magneto-optical disc drives, optical disc drives, memory cards, and solid-state drives (SSDs)
Data_storage
1997 book by Clayton M. Christensen
Innovator's Dilemma: Structural Analysis of Creative Destruction in the Hard Disk Drive Industry, 1981–1998". Journal of Political Economy. 125 (3): 798–847
The_Innovator's_Dilemma
used as an abstract concept, not a track in the physical sense. Hard disk drive Disk sector Cylinder "Storage Concepts!". quizlet.com. Retrieved 19 May
Track_(disk_drive)
IBM PC compatible home computer system
floppy drive; an empty drive bay can host a second such drive. The hard disk RLX/HD comes with a 20 MB hard disk and 1 MB RAM preinstalled. The hard disk occupies
Tandy_1000
(hard disk drives) that were first shipped by Control Data Corporation in December 1973 as the CDC 9760 40 MB (unformatted) storage module disk drive.
Storage_Module_Device
1987 computer by Compaq
80386 CPU, 1 MB RAM, 16 KB ROM, 1.2 MB 5¼-inch floppy, 40 or 100 MB hard disk drive, priced at US$7,999 or 9,999 respectively, and a 10" amber gas-plasma
Compaq_Portable_386
Hard disk drive
early hard disk drives introduced by Seagate in 1980 and 1981 respectively, that later became construed as hard disk drive interfaces: the ST-506 disk interface
ST-506/ST-412
or 60 GB hard disk drive in the US and Japan, respectively— priced from US$499 to US$599; and with either a 40, 60, or 80 GB hard disk drive in Europe
PlayStation_3_models
Linux command-line program for modifying hard disk drive parameters
for Linux to set and view ATA hard disk drive hardware parameters and test performance. It can set parameters such as drive caches, sleep mode, power management
Hdparm
Seagate Technology hard disk drive
The ST3000DM001 is a hard disk drive released by Seagate Technology in 2011 as part of the Seagate Barracuda series. It has a capacity of 3 terabytes
ST3000DM001
Computer storage device manufacturer
(Hitachi Global Storage Technologies) was a manufacturer of hard disk drives, solid-state drives, and external storage products and services. It was initially
HGST
Home computer introduced in 1992
redesign of the Amiga 500 Plus, it adds the option of an internal hard disk drive and a PCMCIA port. Lacking a numeric keypad, the A600 is only slightly
Amiga_600
Programmable machine that processes data
output devices such as the display and printer. Hard disk drives, floppy disk drives and optical disc drives serve as both input and output devices. Computer
Computer
Shell command for copying and converting file data
On modern hard-disk drives, zeroing the drive will render most data it contains permanently irrecoverable. However, with other kinds of drives such as flash
Dd_(Unix)
Method for interpreting data in digital storage systems
magnetic storage on hard disk or tape drives. Ampex introduced PRML in a tape drive in 1984. IBM introduced PRML in a disk drive in 1990 and also coined
Partial-response maximum-likelihood
Partial-response_maximum-likelihood
Any of a set of standard configurations of Redundant Arrays of Independent Disks
large reliable data stores from multiple general-purpose computer hard disk drives (HDDs). The most common types are RAID 0 (striping), RAID 1 (mirroring)
Standard_RAID_levels
drives in chronological order of introduction. Disk II Disk III Apple "Twiggy" FileWare Disk IIc 400K Drive (internal) Macintosh External Disk Drive (400K)
List_of_Apple_drives
Read-write head of a hard disk making contact with the platter
A head crash is a hard-disk failure that occurs when a read–write head of a hard disk drive makes contact with its rotating platter, slashing its surface
Head_crash
Computer filing system
developed for many types of storage devices, including hard disk drives (HDDs), solid-state drives (SSDs), magnetic tapes and optical discs. A portion of
File_system
Directory entry (in a directory-based file system) that associates a name with a file
stored on the hard disk drive. On Unix-like systems, the link() system call can create additional hard links to existing files. To create hard links, end-users
Hard_link
American computer peripheral manufacturer
introduce a hard disk drive form factor compatible with a floppy disk drive, the SA1000 form factor compatible with the 8-inch floppy drive form factor
Shugart_Associates
Historical method for giving addresses to physical data blocks on hard disk drives
early method for giving addresses to each physical block of data on a hard disk drive. It is a 3D-coordinate system made out of a vertical coordinate head
Cylinder-head-sector
Implementation of logical volume manager for Microsoft Windows NT
"Windows Vista support for large-sector hard disk drives". Microsoft Support. May 29, 2007. Captive-NTFS Logical Disk Manager FAQ Comparison matrix of Windows
Logical_Disk_Manager
HARD DISK-DRIVE
HARD DISK-DRIVE
Surname or Lastname
English (chiefly Midlands)
English (chiefly Midlands) : variant spelling of Heard.
Surname or Lastname
English
English : from the possessive case of the personal name Hard, denoting a son or servant of someone called Hard.
Boy/Male
American, Anglo, Arabic, Australian, British, Christian, English, German, Irish, Jamaican, Teutonic
Bard; Surname; Guardian; Watchman
Male
Egyptian
, disk.
Male
English
 Short form of English Richard, DICK means "powerful ruler." Compare with another form of Dick.
Male
English
Pet name for longer English names containing Hard- or Hart-, HARDY means "brave, hardy, strong."Â
Boy/Male
American, Australian, British, Chinese, Christian, Danish, Dutch, English, French, German, Swedish, Teutonic
Rich and Powerful Ruler; Powerful; Rich Ruler; Dominant Ruler; Peaceful Ruler; Strong Power; Hardy Power; Powerful Ruler; Brave; First of the People
Boy/Male
Hindu
Hearts feeling, Main, Meaning
Male
German
Short form of German Harman, HARM means "bold/hardy man." In use by the Dutch.
Male
Japanese
(1-晴, 2-春, 3-陽) Japanese unisex name HARU means 1) "clear up," 2) "spring," or 3) "sun, sunlight." Compare with another form of Haru.
Surname or Lastname
English (chiefly Yorkshire and Northumbria), also Scottish
English (chiefly Yorkshire and Northumbria), also Scottish : variant spelling of Heard.
Surname or Lastname
English
English : from the Old English personal name Heard or a Norman cognate Hard(on), also of Germanic origin. This was a byname meaning ‘hardy’, ‘brave’, ‘strong’, but it also seems to have been used as a short form of the various compound names containing this as a first element. Occasionally this may also be a variant of Hardy.English, German, Dutch, and Swedish (Hård) : nickname for a stern or severe man, from Middle English, Middle Low German hard, Middle Dutch hart, hert, Swedish hård ‘hard’, ‘inflexible’. The Swedish name was probably originally a soldier’s name.English : topographic name for someone who lived on a patch of particularly hard ground or one that was difficult to farm. Compare Hardacre.Dutch : occupational name from Middle Dutch harde, herde ‘herder’.
Male
Egyptian
, Horus, the winged disk of the sun.
Boy/Male
Australian, Egyptian
Sun Disk
Surname or Lastname
English
English : habitational name from Diss in Suffolk, which gets its name from a Norman pronunciation of Middle English diche, Old English dīc ‘ditch’, ‘dike’ (see Dyke).German : habitational name from Dissen near the Teutoburg forest.
Surname or Lastname
English
English : variant of Heard.
Surname or Lastname
English
English : variant of Herd.Respelling of Swedish HÃ¥rd (see Hard 2).
Surname or Lastname
English, Scottish, and French
English, Scottish, and French : nickname for a brave or
foolhardy man, from Old French, Middle English hardi ‘bold’,
‘courageous’ (of Germanic origin; compare Hard 1).Irish : in addition to being an importation of the English name,
this is also found as an Anglicized form (by partial translation) of
Gaelic Mac Giolla Deacair ‘son of the hard lad’.Scottish : variant spelling of Hardie 2.Bearers of the surname Hardy from Anjou and Normandy, France, are documented
in Quebec City in 1669. The secondary surnames Châtillon,
Surname or Lastname
English
English : habitational name from Chard or South Chard in Somerset, recorded in Domesday Book as Cerdren, possibly from Old English ceart ‘rough heathland’ + ærn ‘building’, ‘dwelling’. In some instances the surname may have arisen simply as a topographic name from ceart.French : from the personal name Chard, a short form of Richard;French : habitational name for someone from Chard in the department of Creuse.
Male
German
 Short form of German Diederick, DIRK means "first of the people; king of nations."
HARD DISK-DRIVE
HARD DISK-DRIVE
Surname or Lastname
English
English : habitational name from any of the numerous places named with Old English cnihta, genitive plural of cniht ‘servant’, ‘retainer’ + tūn ‘enclosure’, ‘settlement’.
Male
Babylonian
, an early Babylonian king.
Girl/Female
Gujarati, Hindu, Indian
Happy
Surname or Lastname
English
English : variant of Purdy.
Boy/Male
Arabic, Australian, Iranian, Muslim, Parsi
Star
Girl/Female
Irish American
Modern phonetic form of the Irish name Caitlin from Catherine meaning pure.
Boy/Male
Indian, Punjabi, Sikh
Servant of God's Feet
Boy/Male
Hindu, Indian, Sanskrit
Unending; Never Lapsing; Eternal
Girl/Female
English
The Perfect Life
Boy/Male
Tamil
Spirit of the wind
HARD DISK-DRIVE
HARD DISK-DRIVE
HARD DISK-DRIVE
HARD DISK-DRIVE
HARD DISK-DRIVE
superl.
Not easily penetrated, cut, or separated into parts; not yielding to pressure; firm; solid; compact; -- applied to material bodies, and opposed to soft; as, hard wood; hard flesh; a hard apple.
superl.
Difficult to please or influence; stern; unyielding; obdurate; unsympathetic; unfeeling; cruel; as, a hard master; a hard heart; hard words; a hard character.
n.
To incur the risk or danger of; as, to risk a battle.
adv.
With difficulty; as, the vehicle moves hard.
n.
The food served in a dish; hence, any particular kind of food; as, a cold dish; a warm dish; a delicious dish. "A dish fit for the gods."
n.
To expose to risk, hazard, or peril; to venture; as, to risk goods on board of a ship; to risk one's person in battle; to risk one's fame by a publication.
n.
A circular structure either in plants or animals; as, a blood disk; germinal disk, etc.
superl.
Rough; acid; sour, as liquors; as, hard cider.
v. t.
To make dusk.
v. i.
To grow dusk.
n.
A circular structure either in plants or animals; as, a blood disc, a germinal disc, etc. Same as Disk.
a.
Having hard or strong hands; as, a hard-fisted laborer.
n.
The lower side of the body of some invertebrates, especially when used for locomotion, when it is often called a creeping disk.
superl.
Difficult to bear or endure; not easy to put up with or consent to; hence, severe; rigorous; oppressive; distressing; unjust; grasping; as, a hard lot; hard times; hard fare; a hard winter; hard conditions or terms.
superl.
Wanting softness or smoothness of utterance; harsh; as, a hard tone.
n.
A flat, circular plate; as, a disk of metal or paper.
superl.
Difficult to accomplish; full of obstacles; laborious; fatiguing; arduous; as, a hard task; a disease hard to cure.
a.
Hard-featured; ill-looking; as, Vulcan was hard-favored.
v. t.
To harden; to make hard.
v. t.
To stab with a dirk.