Search references for ROCKET ENGINE. Phrases containing ROCKET ENGINE
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Non-airbreathing engine used to propel a missile or vehicle
A rocket engine, also known as a rocket motor, is a reaction engine, producing thrust in accordance with Newton's third law by ejecting reaction mass
Rocket_engine
Type of propelling nozzle
A rocket engine nozzle is a propelling nozzle (usually of the de Laval type) used in a rocket engine to expand and accelerate combustion products to high
Rocket_engine_nozzle
Rocket engine used on the Saturn V rocket
The F-1 is a rocket engine developed by Rocketdyne. The engine uses a gas-generator cycle developed in the United States in the late 1950s and was used
Rocketdyne_F-1
Type of rocket engine
The aerospike engine is a type of rocket engine that maintains its aerodynamic efficiency across a wide range of altitudes. It belongs to the class of
Aerospike_engine
Type of rocket engine which uses liquid fuel stored at very low temperatures
A cryogenic rocket engine is a rocket engine that uses a cryogenic fuel and oxidizer; that is, both its fuel and oxidizer are gases which have been liquefied
Cryogenic_rocket_engine
Rocket engine that uses liquid fuels and oxidizers
A liquid-propellant rocket or liquid rocket uses a rocket engine burning liquid propellants. (Alternate approaches use gaseous or solid propellants.) Liquids
Liquid-propellant_rocket
This page is an incomplete list of orbital rocket engine data and specifications. Comparison of orbital launch systems Comparison of orbital launchers
Comparison of orbital rocket engines
Comparison_of_orbital_rocket_engines
SpaceX family of liquid-fuel rocket engines
Raptor is a family of rocket engines developed and manufactured by SpaceX. It is the third rocket engine in history designed with a full-flow staged combustion
SpaceX_Raptor
Methalox spacecraft propulsion system
Prometheus rocket engine is an ongoing European Space Agency (ESA) development effort begun in 2017 to create a reusable methane-fueled rocket engine for use
Prometheus_(rocket_engine)
Liquid-fueled rocket engine
liquid-propellant rocket engine designed by aerospace company Rocket Lab and manufactured in Long Beach, California. The engine is used on the company's own rocket, Electron
Rutherford_(rocket_engine)
Liquid fuel rocket engine
liquid-fuel rocket engine burning liquid oxygen and liquid methane in an oxidizer-rich staged combustion cycle. It is designed by aerospace company Rocket Lab
Archimedes_(rocket_engine)
Synergetic Air Breathing Rocket Engine - a proposed hybrid ramjet and rocket engine
Rocket Engine) was a concept under development by Reaction Engines Limited for a hypersonic precooled hybrid air-breathing rocket engine. The engine was
SABRE_(rocket_engine)
Reciprocating internal combustion engine
V8, also referred to as the Rocket, is a series of engines that was produced by Oldsmobile from 1949 until 1990. The Rocket, along with the 1949 Cadillac
Oldsmobile_V8_engine
Vehicle propelled by ejection of gases
A rocket (from Italian: rocchetto, lit. ''bobbin/spool'', and so named for its shape) is an elongated flying vehicle that uses a rocket engine to accelerate
Rocket
Type of rocket engine
first successful flight test of an experimental rocket powered by a rotating detonation rocket engine, powered by liquid propellants. The test took place
Rotating_detonation_engine
German long-range ballistic missile
suborbital launch vehicle. The missile, powered by a liquid-propellant rocket engine, was developed during the Second World War in Nazi Germany as a "vengeance
V-2_rocket
American aerospace company
Florida "Space Coast". Firefly performed its first hot-fire engine test of the "Firefly Rocket Engine Research 1" (FRE-R1) on September 10, 2015. The initial
Firefly_Aerospace
US Nuclear thermal rocket engine project (1956–1973)
The Nuclear Engine for Rocket Vehicle Application (NERVA; /ˈnɜːrvə/) was an American nuclear thermal rocket engine development program that ran for roughly
NERVA
French rocket engine
rocket engines for Ariane 5 and Ariane 6. Its development began in 1988 and the first flight was completed in 1996. The updated version of the engine
Vulcain_(rocket_engine)
Form of electric spacecraft propulsion
during the 1960s and in 1964, and the engine was sent into a suborbital flight aboard the Space Electric Rocket Test-1 (SERT-1). It successfully operated
Ion_thruster
Rocket engine that uses both liquid / gaseous and solid fuel
states of matter), hybrid rockets tend to fail more benignly than liquids or solids. Like liquid rocket engines, hybrid rocket motors can be shut down easily
Hybrid-propellant_rocket
Indian rocket engine
The Vikas engine (a portmanteau from initials of VIKram Ambalal Sarabhai ) is a family of hypergolic liquid fuelled rocket engines conceptualized and designed
Vikas_(rocket_engine)
Nuclear spacecraft propulsion technology
rocket (NTR) is a type of thermal rocket where the heat from a nuclear reaction replaces the chemical energy of the propellants in a chemical rocket.
Nuclear_thermal_rocket
Rocket engine in SpaceX Falcon launch vehicles
Merlin is a family of rocket engines developed by SpaceX. They are currently a part of the Falcon 9 and Falcon Heavy launch vehicles, and were formerly
SpaceX_Merlin
American aerospace company
New Shepard rocket and the heavy-lift New Glenn rocket. In addition to producing engines for its own rockets, Blue Origin supplies engines for other vehicles
Blue_Origin
Liquid form of rocket propellants
Many factors go into choosing a propellant for a liquid-propellant rocket engine. The primary factors include ease of operation, cost, hazards/environment
Liquid_rocket_propellant
European rocket engine for upper stages
Vinci is a restartable, cryogenic, liquid-propellant rocket engine that powers the upper stage of Ariane 6. While development began in 1998 for the planned
Vinci_(rocket_engine)
Soviet super heavy-lift launch vehicle (1965–1972)
eight and four hot staged engines respectively, planned to bring the rocket to low Earth orbit. Dangers of the complex engine cluster and fuel feeder systems
N1_(rocket)
Engines used in EU rocket Ariane
The Viking rocket engines were members of a series of bipropellant engines for the first and second stages of the Ariane 1 through Ariane 4 commercial
Viking_(rocket_engine)
Rocket engines developed by SpaceX
four families of rocket engines — Merlin, Kestrel, Draco and SuperDraco — and since 2016 developed the Raptor methane rocket engine and after 2020, a
SpaceX_rocket_engines
American public spaceflight company
atmosphere transition. In November 2022, Rocket Lab cut the ribbon on an engine test facility for the Archimedes engine at NASA's Stennis Space Center. In March
Rocket_Lab
Aircraft engine that produces thrust by emitting a jet of gas
may include rocket, water jet, and hybrid propulsion, the term jet engine typically refers to an internal combustion air-breathing jet engine such as a
Jet_engine
Chemical or mixture used in a rocket engine
Rocket propellant is used as a reaction mass ejected from a rocket engine to produce thrust. The energy required can either come from the propellants
Rocket_propellant
Launch vehicles developed by Astra
electric-pump-fed rocket engines, and a mass simulator meant to occupy the place of a second stage. Rocket 2 was a prototype similar to Rocket 1. Rocket 3 was a launch
Astra_Rocket
Space Shuttle and SLS main engine
The RS-25, also known as the Space Shuttle Main Engine (SSME), is a liquid-fuel cryogenic rocket engine that was used on NASA's Space Shuttle and is used
RS-25
Rocket engine
rocket engine designed and manufactured by Rocket Lab. A bipropellant is used for the propulsion of the third stage/kick stage of the Electron rocket
Curie_(rocket_engine)
Liquid fueled rocket engine
liquid-fuel, upper-stage rocket engine in development[update] by Avio on behalf of European Space Agency for use on Vega E. The engine is a derivative of the
M10_(rocket_engine)
1960s American crewed suborbital rocket
monitoring the rocket's performance during flight. If it detected an anomaly which might threaten the astronaut, such as loss of flight control, engine thrust
Mercury-Redstone Launch Vehicle
Mercury-Redstone_Launch_Vehicle
Russian rocket engine
Двигатель-180 (РД-180), romanized: Raketnyy Dvigatel-180, lit. 'Rocket Engine-180') is a rocket engine that was designed and built in Russia. It features a dual
RD-180
Two-stage small launch vehicle, 200-300 kg to LEO
Rutherford engines are the first electric-pump-fed engine to power an orbital-class rocket. Electron is often flown with a kickstage or Rocket Lab's Photon
Rocket_Lab_Electron
Type of rocket pack
Rocket Belt is a low-power rocket propulsion device that allows an individual to safely travel or leap over small distances. It is a type of rocket pack
Bell_Rocket_Belt
Rocket with a motor that uses solid propellants
solid-propellant rocket or solid rocket is a rocket with a rocket engine that uses solid propellants (fuel/oxidizer). The earliest rockets were solid-fuel rockets powered
Solid-propellant_rocket
Type of rocket engine
type of rocket engine which uses the expansion of a (typically inert) pressurized gas to generate thrust. As opposed to traditional rocket engines, a cold
Cold_gas_thruster
Family of rocket stages which can be used as a space tug
rocket. Earlier Common Centaurs were propelled by the RL10-A-4-2 version of the RL-10. Since 2014, Common Centaur has flown with the RL10-C-1 engine,
Centaur_(rocket_stage)
Rocket engine operation method
preburner cycle, or closed cycle) is a power cycle of a bipropellant rocket engine. In the staged combustion cycle, propellant flows through multiple combustion
Staged_combustion_cycle
A rocket turbine engine is a combination of two types of propulsion engines: a liquid-propellant rocket and a turbine jet engine. Its power-to-weight ratio
Rocket_turbine_engine
Aircraft which uses a rocket engine for propulsion
A rocket-powered aircraft or rocket plane is an aircraft that uses a rocket engine for propulsion, sometimes in addition to airbreathing jet engines. Rocket
Rocket-powered_aircraft
Jet engine where combustion takes place in supersonic airflow
accelerated to Mach 4.5 via a solid rocket booster, and then ignited the Pratt & Whitney Rocketdyne scramjet engine to reach Mach 5 at 70,000 feet (21
Scramjet
Soviet launch vehicle
to revive the launch vehicle. Its RD-170 booster engine was at the time the most powerful rocket engine to use liquid fuel, and scaled-down versions of
Energia_(rocket)
Type of engine
an equal, but opposite, reaction force." Examples include jet engines, rocket engines, pump-jets, and more uncommon variations such as Hall effect thrusters
Reaction_engine
Electrothermal thruster in development
eliminating electrode erosion, a major source of wear in ion engines. Compared to traditional rocket engines with very complex plumbing, high performance valves
Variable Specific Impulse Magnetoplasma Rocket
Variable_Specific_Impulse_Magnetoplasma_Rocket
American metallurgist (born c. 1965)
mid-1990s, she co-invented Mondaloy, a nickel-based superalloy used in rocket engines, while working at Rocketdyne. On June 22, 2025, she disappeared while
Monica_Reza
Most common type of rocket, used to launch satellites
A multistage rocket or step rocket is a launch vehicle that uses two or more rocket stages, each of which contains its own engines and propellant. A tandem
Multistage_rocket
Space launch vehicle in development
explosion". SpaceNews. Retrieved 23 August 2024. "Rocket Factory Augsburg Chose Helix Rocket Engine in a Public Contest". Orbital Today. 2022-05-05. Retrieved
RFA_One
Rocket engines for maneuvering
A vernier thruster is a rocket engine used on a spacecraft or launch vehicle for fine adjustments to the attitude or velocity. Depending on the design
Vernier_thruster
Executor is a rocket engine developed by ARCA for use on its Haas rocket series and on IAR 111 Excelsior supersonic airplane. Executor uses kerosene and
Executor_(rocket_engine)
Soviet (now Russian) rocket engine, the most powerful in the world
romanized: Raketnyy Dvigatel-170, lit. 'Rocket Engine-170') is the world's most powerful and heaviest liquid-fuel rocket engine. It was designed and produced in
RD-170
First South Korean orbital launch vehicle developed domestically
mass of 52.1 tons. The main-stage liquid rocket propellant engine was fully gimballed. With the 2nd stage engine installed, the two-stage version of TLV
Nuri_(rocket)
Rocket engine operation method
The electric-pump-fed engine is a bipropellant rocket engine in which the fuel pumps are electrically powered, and so all of the input propellant is directly
Electric-pump-fed_engine
Type of spacecraft propulsion system
A nuclear electric rocket (more properly nuclear electric propulsion) is a type of spacecraft propulsion system where thermal energy from a nuclear reactor
Nuclear_electric_rocket
Thrust produced by ejecting a jet of fluid
aircraft propulsion, the pump-jet used for marine propulsion, and the rocket engine and plasma thruster used for spacecraft propulsion. Underwater jet propulsion
Jet_propulsion
Location where rocket engines may be tested on the ground, under controlled conditions
A rocket engine test facility is a location where rocket engines may be tested on the ground, under controlled conditions. A ground test program is generally
Rocket_engine_test_facility
American rocket engine design and production company
Rocketdyne was an American rocket engine design and production company headquartered in Canoga Park, in the western San Fernando Valley of suburban Los
Rocketdyne
American private rocket engine and spaceflight development company
XCOR Aerospace was an American private spaceflight and rocket engine development company based at the Mojave Air and Space Port in Mojave, California
XCOR_Aerospace
Type of electric propulsion
expected to be conducted in 2016. Plasma engines have a much higher specific impulse (Isp) than most other types of rocket technology. The VASIMR thruster can
Plasma_propulsion_engine
Type of rocket engine fuel
is away from large hypergolic rocket engines and toward hydrogen/oxygen engines or methane/oxygen and RP-1/oxygen engines for various advantages and disadvantages
Hypergolic_propellant
American physicist and inventor (1882–1945)
rocket engines for jet-assisted take-off (JATO) of aircraft. These rocket engines were the precursors to the larger throttlable rocket plane engines that
Robert_H._Goddard
Small recreational rocket
trying to make their own rocket engines. With the launch of Sputnik, many young people were trying to build their own rocket motors, often with tragic
Model_rocket
US NASA & DOD program 2000-2002
Booster for Reusable Applications". The RS-83 was a rocket engine design for a reusable LH2/LOX rocket larger and more powerful than any other. The RS-83
Space_Launch_Initiative
Rocket that burns 3 propellants at once or 2 fuels with an oxidizer, sequentially
been flown. There are two different kinds of tripropellant rockets. One is a rocket engine which mixes three separate streams of propellants, burning
Tripropellant_rocket
Indian spaceflight company
rocket will use an upper stage cryogenic engine powered by the Dhawan-series rocket engine. On 22 December 2020, Skyroot tested the solid-fuel rocket
Skyroot_Aerospace
Change in velocity per amount of fuel
an engine, such as a rocket or jet engine, generates thrust from propellant. Isp is the effective exhaust velocity used in the Tsiolkovsky rocket equation
Specific_impulse
Rocket engine operation method
The pressure-fed engine is a class of rocket engine designs. A separate gas supply, usually helium, pressurizes the propellant tanks to force fuel and
Pressure-fed_engine
1950s supersonic intercontinental cruise missile
the allied forces. Jet engines were already widely used after their introduction in the UK, but the V-1 flying bomb and V-2 rocket represented technologies
SM-64_Navaho
Rocket family
The Delta rocket family was a versatile range of American rocket-powered expendable launch systems that provided space launch capability in the United
Delta_(rocket_family)
United Launch Alliance launch vehicle
reducing hydrocarbon buildup in engines, which would facilitate refurbishment under the proposed SMART reuse system. The rocket's second stage, the Centaur
Vulcan_Centaur
Launch system that only uses one rocket stage
then use onboard liquid oxygen after switching to the closed cycle rocket engine at high altitude, the McDonnell Douglas DC-X, the Lockheed Martin X-33
Single-stage-to-orbit
Rockets that use supersonic exhaust to create additional acceleration
Air-augmented rockets use the supersonic exhaust of some kind of rocket engine to further compress air collected by ram effect during flight to use as
Air-augmented_rocket
Liquid fuel cryogenic rocket engine, typically used on rocket upper stages
The RL10 is a liquid-fuel cryogenic rocket engine built in the United States by Aerojet Rocketdyne that burns cryogenic liquid hydrogen and liquid oxygen
RL10
Rocket engine
J-2, commonly known as Rocketdyne J-2, was a liquid-fuel cryogenic rocket engine used on NASA's Saturn IB and Saturn V launch vehicles. Built in the
Rocketdyne_J-2
Machine that converts one or more forms of energy into mechanical energy (of motion)
locomotive engine Spacecraft propulsion engines such as Rocket engine Traction engine Aircraft engine Automobile engine replacement Electric motor Engine cooling
Engine
NASA low cost rocket engine design
Fastrac was a turbo pump-fed, liquid rocket engine. The engine was designed by NASA as part of the low cost X-34 Reusable Launch Vehicle (RLV) and as
Fastrac_(rocket_engine)
Reusable superheavy-lift general-purpose launch vehicle
which are powered by Raptor (RSL) and Raptor Vacuum (RVac) engines. The bodies of both rocket stages are made from stainless steel and are manufactured
SpaceX_Starship
Medium-range ballistic missile (MRBM)
was a liquid-propellant rocket using RP-1 fuel and LOX oxidizer, with a single Rocketdyne LR79-NA (model S-3D) rocket engine producing 150,000 lbf (670 kN)
PGM-19_Jupiter
Rocket used to augment the thrust of a larger rocket
is a rocket (or rocket engine) used either in the first stage of a multistage launch vehicle or in parallel with longer-burning sustainer rockets to augment
Booster_(rocketry)
American rocketry company
additional rocket engine to fill up the base of the main rocket engine. (Similar problems would have occurred in a conventional aerospike engine, but there
Rotary_Rocket
Canadian aerospace company
SHARP Arrow unmanned aircraft, the SHARP Sabre rocket-based platform, and the M2S-HyRock rocket engine. In August 2025, the company broke ground on the
NordSpace
Type of spacecraft
high-pressure rocket engine combustion chambers and the entire mechanical spaceframe and integral propellant tanks for a small satellite. A 3D printed rocket engine
3D-printed_spacecraft
Type of nuclear propulsion method with an ultra high specific-inpulse
The fission-fragment rocket is a rocket engine design that directly harnesses hot nuclear fission products for thrust, as opposed to using a separate
Fission-fragment_rocket
U.S. Space Nuclear Thermal Propulsion
nuclear engine. With the next phase's Nuclear Engine for Rocket Vehicle Application (NERVA), NASA and AEC sought to develop a nuclear thermal rocket for "both
Demonstration Rocket for Agile Cislunar Operations
Demonstration_Rocket_for_Agile_Cislunar_Operations
Pump driven by a gas turbine
chamber of a rocket engine. While they have considerably higher design complexity, turbopump fed systems scale much more favorably in large rockets than pressure-fed
Turbopump
American launch vehicle manufacturer
Beach, California. Relativity Space is developing launch vehicles, rocket engines, and manufacturing technologies for commercial orbital launch services
Relativity_Space
NASA super heavy-lift expendable launch vehicle used in the Artemis Program
is powered by four ex-Shuttle RS-25 engines. Attached to the core are two Northrop Grumman five-segment Solid Rocket Boosters, built for the Ares vehicles
Space_Launch_System
Rocket engine operation method
as the GG cycle, is one of the most commonly used engine cycles in bipropellant liquid rocket engines. Propellant is burned in a gas generator (analogous
Gas-generator_cycle
Unguided air-to-surface rocket
The RP-3 (from Rocket Projectile 3 inch) was a British air-to-ground rocket projectile introduced during the Second World War. The "3 inch" designation
RP-3
Supersonic atmospheric jet engine
Merkulov did further ramjet tests using a two-stage rocket, the R-3. He developed the first ramjet engine for use as an auxiliary motor of an aircraft, the
Ramjet
Hypothetical type of spacecraft
spacecraft engine using a gaseous fission reactor to achieve nuclear propulsion. Specifically, it would be a type of gas core reactor rocket that uses
Nuclear_lightbulb
Rocket driven by nuclear fusion power
A fusion rocket is a theoretical design for a rocket driven by fusion propulsion, which could provide efficient and sustained acceleration in space without
Fusion_rocket
Science museum in Huntsville, Alabama
(DPS/APS) engines for the Lunar Module. Engines from the V-2 engine to NERVA to the Space Shuttle Main Engine are on display as well. The rocket park area
U.S._Space_&_Rocket_Center
Type of spacecraft
reaction mass, energy, and engines with it. No known technology can bring a rocket to relativistic speed. Relativistic rockets require huge advances in
Relativistic_rocket
ROCKET ENGINE
ROCKET ENGINE
Boy/Male
French, German, Hebrew, Italian
Rest; Rock
Male
English
Variant spelling of English Ricky, RICKEY means "powerful ruler."
Surname or Lastname
English
English : variant of Rock 2.
Boy/Male
French
Rock.
Surname or Lastname
English (Devon and Somerset)
English (Devon and Somerset) : from a diminutive of Cocke.
Surname or Lastname
English
English : variant of Roke, a topographic name for someone who lived near an oak tree (see Oak), from a misdivision of Middle English atter oke ‘at the oak’. Roke in Oxfordshire and Rock in Worcestershire are named in this way, and so the surname may be habitational in some cases.English : possibly a variant of Rock 1.
Boy/Male
English American
Rock.
Surname or Lastname
English (Devon)
English (Devon) : unexplained.
Boy/Male
American, Australian, British, Chinese, Christian, Danish, English, German, Italian
Dweller by the Rock; From the Rock Fortress; Stone Camp; Rest
Boy/Male
British, English
From the Rock Meadow
Male
German
Low German form of Old High German Ricohard, RICKERT means "powerful ruler."
Boy/Male
American, Australian, British, English, French, German, Italian, Jamaican
Rock; Form of Rockne; From the Rock Fortress; Stone Camp; Rest
Surname or Lastname
English
English : variant spelling of Rock.German (Röcke) : variant of Rock 4.
Surname or Lastname
English
English : variant of Rocker.
Surname or Lastname
English
English : occupational name for a spinner or a maker of distaffs, from an agent derivative of Middle English rok ‘distaff’ (see Rock).German : from a Germanic personal name based on hrÅd ‘renown’.habitational name from a farm named Rokken in Pustertal, south Tyrol (Italy).German (Röcker) : from a topographic name or a place name Röcke (formerly Roke) near Bückeburg, Lower Saxony.
Boy/Male
English American
Rock.
Surname or Lastname
German (also Rücker)
German (also Rücker) : nickname from Middle High German rucken ‘to move or draw’.North German : nickname from Middle Low German rucker ‘thief’, ‘greedy or acquisitive person’.German : from a reduced form of the Germanic personal name Rudiger.English : variant of Rocker.
Boy/Male
French
Rock.
Boy/Male
British, English
From the Rock Meadow
Boy/Male
British, English, Jamaican
From the Rock Meadow; Rocky Field
ROCKET ENGINE
ROCKET ENGINE
Girl/Female
African, Arabic, Australian, Danish
Sweet and Kind
Boy/Male
Hindu, Indian, Tamil
Lord Shiva
Girl/Female
Muslim/Islamic
Mountain gazelle
Girl/Female
American, Australian, British, Christian, Danish, Dutch, English, Gaelic, German, Greek, Irish, Latin
Dweller Near a Hollow; From the Round Hill; The Hollow; Maiden; Seething Pool; Ravine
Boy/Male
Australian, Czech, Danish, French, German
Czech Form of Nicholas
Boy/Male
Hindu
Difficult to conquer, Unvanquished
Boy/Male
Indian, Sanskrit
Six Footed Insects
Boy/Male
Shakespearean
All's Well That Ends Well.' An old lord.
Girl/Female
Indian, Sikh
Happiness
Boy/Male
Australian, Hebrew
Bringer of Light
ROCKET ENGINE
ROCKET ENGINE
ROCKET ENGINE
ROCKET ENGINE
ROCKET ENGINE
n.
A play horse on rockers; a rocking-horse.
v. t.
To mark with a ticket; as, to docket goods.
v. t.
To put, or conceal, in the pocket; as, to pocket the change.
v. i.
To play at cricket.
n.
An artificial firework consisting of a cylindrical case of paper or metal filled with a composition of combustible ingredients, as niter, charcoal, and sulphur, and fastened to a guiding stick. The rocket is projected through the air by the force arising from the expansion of the gases liberated by combustion of the composition. Rockets are used as projectiles for various purposes, for signals, and also for pyrotechnic display.
v. t.
To tether to, or as to, a picket; as, to picket a horse.
n.
A skate with a curved blade, somewhat resembling in shape the rocker of a cradle.
a.
Affected with rickets.
n.
Rocket larkspur. See below.
v. t.
To put a jacket on; to furnish, as a boiler, with a jacket.
n.
Crockets. See Crocket.
v. t. & i.
To knit with a crochet needle or hook; as, to crochet a shawl.
v. i.
To make a confused noise or racket.
n.
One who rocks; specifically, one who rocks a cradle.
n.
A chair mounted on rockers; a rocking-chair.
imp. & p. p.
of Rocket
v. t.
To strike with, or as with, a racket.
v. t.
To enter or inscribe in a docket, or list of causes for trial.