rocket

rock·et¹

n.1. a. A rocket engine.b. A vehicle or device propelled by one or more rocket engines, especially such a vehicle designed to travel through space.2. A projectile weapon carrying a warhead that is powered and propelled by rockets.3. A projectile firework having a cylindrical shape and a fuse that is lit from the rear.v. rock·et·ed, rock·et·ing, rock·ets v.intr.1. To move swiftly and powerfully, as a rocket2. To fly swiftly straight up, as a game bird frightened from cover.3. To soar or rise rapidly: The book rocketed to the top of the bestseller list.v.tr.1. To carry by means of a rocket.2. To assault with rockets.

[Italian rocchetta, diminutive of rocca, spindle, distaff, of Germanic origin.]

rock·et²

R0276800 (rŏk′ĭt)n.1. See arugula.2. Any of several plants of the mustard family, especially the dame's rocket and the sea rocket.

[Middle English rokette, from Old French roquete, from Italian rochetta, variant of ruchetta, diminutive of ruca, arugula, from Latin ērūca.]

rocket

(ˈrɒkɪt) n1. (Astronautics) a self-propelling device, esp a cylinder containing a mixture of solid explosives, used as a firework, distress signal, line carrier, etc2. a self-propelling device, esp a cylinder containing a mixture of solid explosives, used as a firework, distress signal, line carrier, etc3. (Astronautics) a. any vehicle propelled by a rocket engine, esp one used to carry a warhead, spacecraft, etcb. (as modifier): rocket propulsion; rocket launcher. 4. informal Brit and NZ a severe reprimand (esp in the phrase get a rocket)vb, -ets, -eting or -eted5. (Astronautics) (tr) to propel (a missile, spacecraft, etc) by means of a rocket6. (intr; foll by off, away, etc) to move off at high speed7. (intr) to rise rapidly: he rocketed to the top. [C17: from Old French roquette, from Italian rochetto a little distaff, from rocca distaff, of Germanic origin]

rocket

(ˈrɒkɪt) n1. (Plants) Also called: arugula a Mediterranean plant, Eruca sativa, having yellowish-white flowers and leaves used as a salad: family Brassicaceae (crucifers)2. (Plants) any of several plants of the related genus Sisymbrium, esp S. irio (London rocket), which grow on waste ground and have pale yellow flowers3. (Plants) yellow rocket any of several yellow-flowered plants of the related genus Barbarea, esp B. vulgaris4. (Plants) sea rocket any of several plants of the related genus Cakile, esp C. maritima, which grow along the seashores of Europe and North America and have mauve, pink, or white flowers5. (Plants) dame's rocket another name for dame's violet[C16: from French roquette, from Italian rochetta, from Latin ērūca a caterpillar, hairy plant]

rock•et¹

art at Rocky Mountains (ˈrɒk ɪt)

n. 1. any of various tubelike devices containing combustibles that on being ignited propel the tube through the air: used for pyrotechnic effect, signaling, hurling explosives, launching a space vehicle, etc. 2. a space capsule or vehicle put into orbit by such devices. 3. rocket engine. v.t. 4. to move or transport by means of a rocket. v.i. 5. to move like a rocket. 6. (of game birds) to fly straight up rapidly when flushed. [1605–15; (< French roquette) < Italian rocchetta, diminutive of rocca distaff (with reference to its shape) < Gothic *rukka, c. Old Norse rokkr, Middle Dutch rocke, Old High German rocco (German Rocken)] rock′et•like`, adj.

rock•et²

(ˈrɒk ɪt)

n. 1. any of various plants belonging to the genus Hesperis, of the mustard family, and related genera. Compare dame's rocket. 2. Also called roquette. arugula. [1520–30; < French roquette < Italian ruchetta, diminutive of ruca < Latin ērūca arugula]

rock·et

(rŏk′ĭt) A vehicle or device propelled by one or more rocket engines, especially such a vehicle designed to travel through space.

rocket

A self-propelled vehicle whose trajectory or course, while in flight, cannot be controlled.

rocket

Past participle: rocketed
Gerund: rocketing

Imperative
rocket
rocket

Present
I rocket
you rocket
he/she/it rockets
we rocket
you rocket
they rocket

Preterite
I rocketed
you rocketed
he/she/it rocketed
we rocketed
you rocketed
they rocketed

Present Continuous
I am rocketing
you are rocketing
he/she/it is rocketing
we are rocketing
you are rocketing
they are rocketing

Present Perfect
I have rocketed
you have rocketed
he/she/it has rocketed
we have rocketed
you have rocketed
they have rocketed

Past Continuous
I was rocketing
you were rocketing
he/she/it was rocketing
we were rocketing
you were rocketing
they were rocketing

Past Perfect
I had rocketed
you had rocketed
he/she/it had rocketed
we had rocketed
you had rocketed
they had rocketed

Future
I will rocket
you will rocket
he/she/it will rocket
we will rocket
you will rocket
they will rocket

Future Perfect
I will have rocketed
you will have rocketed
he/she/it will have rocketed
we will have rocketed
you will have rocketed
they will have rocketed

Future Continuous
I will be rocketing
you will be rocketing
he/she/it will be rocketing
we will be rocketing
you will be rocketing
they will be rocketing

Present Perfect Continuous
I have been rocketing
you have been rocketing
he/she/it has been rocketing
we have been rocketing
you have been rocketing
they have been rocketing

Future Perfect Continuous
I will have been rocketing
you will have been rocketing
he/she/it will have been rocketing
we will have been rocketing
you will have been rocketing
they will have been rocketing

Past Perfect Continuous
I had been rocketing
you had been rocketing
he/she/it had been rocketing
we had been rocketing
you had been rocketing
they had been rocketing

Conditional
I would rocket
you would rocket
he/she/it would rocket
we would rocket
you would rocket
they would rocket

Past Conditional
I would have rocketed
you would have rocketed
he/she/it would have rocketed
we would have rocketed
you would have rocketed
they would have rocketed

rocket

A peppery salad leaf plant widely used in Italian cooking.

Thesaurus

Noun	1.	rocket - any vehicle self-propelled by a rocket engineprojectilemissile - a rocket carrying a warhead of conventional or nuclear explosives; may be ballistic or directed by remote controlmultistage rocket, step rocket - a rocket having two or more rocket engines (each with its own fuel) that are fired in succession and jettisoned when the fuel is exhaustedrocket engine, rocket - a jet engine containing its own propellant and driven by reaction propulsionresearch rocket, test instrument vehicle, test rocket - a rocket fired for test purposesvehicle - a conveyance that transports people or objects
	2.	rocket - a jet engine containing its own propellant and driven by reaction propulsionrocket enginebooster rocket, booster unit, takeoff booster, takeoff rocket, booster - the first stage of a multistage rocketjet engine - a gas turbine produces a stream of hot gas that propels a jet plane by reaction propulsionnuclear rocket - a rocket engine in which a nuclear reactor is used to heat a propellantretrorocket - a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its courserocket, projectile - any vehicle self-propelled by a rocket enginespace rocket - a rocket powerful enough to travel into outer spacethruster - a small rocket engine that provides the thrust needed to maneuver a spacecraft
	3.	rocket - erect European annual often grown as a salad crop to be harvested when young and tenderarugula, Eruca sativa, Eruca vesicaria sativa, garden rocket, rocket salad, roquetteEruca, genus Eruca - annual to perennial herbs of the Mediterranean regionherb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
	4.	rocket - propels bright light high in the sky, or used to propel a lifesaving line or harpoonskyrocketvisual signal - a signal that involves visual communication
	5.	rocket - sends a firework display high into the skyskyrocketfirework, pyrotechnic - (usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc.
Verb	1.	rocket - shoot up abruptly, like a rocket; "prices skyrocketed"skyrocketgo up, rise, move up, lift, arise, come up, uprise - move upward; "The fog lifted"; "The smoke arose from the forest fire"; "The mist uprose from the meadows"
	2.	rocket - propel with a rocketpropel, impel - cause to move forward with force; "Steam propels this ship"

rocket

noun1. missile, projectile There has been a rocket attack on the capital.verb1. escalate, rise, soar, spiral, shoot up, increase dramatically, go through the roof Fresh food is so scarce that prices have rocketed sharply.2. zoom, shoot, career, speed, tear, whizz A train rocketed by.

rocket

verb1. To move swiftly:bolt, bucket, bustle, dart, dash, festinate, flash, fleet, flit, fly, haste, hasten, hurry, hustle, pelt, race, run, rush, sail, scoot, scour, shoot, speed, sprint, tear, trot, whirl, whisk, whiz, wing, zip, zoom.Informal: hotfoot, rip.Slang: barrel, highball.Chiefly British: nip.Idioms: get a move on, get cracking, go like lightning, go like the wind, hotfoot it, make haste, make time, make tracks, run like the wind, shake a leg, step on it.2. To rise abruptly and precipitously:sky, skyrocket, soar.Informal: shoot up.

Translations

火箭宇宙飞船急速上升

rocket

(ˈrokit) noun1. a tube containing materials which, when set on fire, give off a jet of gas which drives the tube forward, usually up into the air, used eg as a firework, for signalling, or for launching a spacecraft. 火箭2. a spacecraft launched in this way. The Americans have sent a rocket to Mars.宇宙飞船 verb – past tense, past participle ˈrocketed – to rise or increase very quickly. Bread prices have rocketed. 急飞速上升

rocket

→ 火箭zhCN

rocket

rocket,

any vehicle propelled by ejection of the gases produced by combustion of self-contained propellants. Rockets are used in fireworks, as military weapons, and in scientific applications such as space exploration.

Rocket Propulsion

The force acting on a rocket, called its thrust, is equal to the mass ejected per second times the velocity of the expelled gases. This force can be understood in terms of Newton's third law of motion, which states that for every action there is an equal and opposite reaction. In the case of a rocket, the action is the backward-streaming flow of gas and the reaction is the forward motion of the rocket. Another way of understanding rocket propulsion is to realize that tremendous pressure is exerted on the walls of the combustion chamber except where the gas exits at the rear; the resulting unbalanced force on the front interior wall of the chamber pushes the rocket forward. A common misconception, before space exploration pointed up its obvious fallacy, holds that a rocket accelerates by pushing on the atmosphere behind it. Actually, a rocket operates more efficiently in outer space, since there is no atmospheric friction to impede its motion.

Rocket Design

The key elements in designing a rocket are the propulsion system, which includes the propellant and the exit nozzle, and determining the number of stages required to lift the intended payload. Rocket navigation is usually based on inertial guidance; internal gyroscopes are used to detect changes in the position and direction of the rocket.

Rocket Propellants

The most vital component of any rocket is the propellant, which accounts for 90% to 95% of the rocket's total weight. A propellant consists of two elements, a fuel and an oxidant; engines that are based on the action-reaction principle and that use air instead of carrying their own oxidant are properly called jets. Propellants in use today include both liquefied gases, which are more powerful, and solid explosives, which are more reliable. The chemical energy of the propellants is released in the form of heat in the combustion chamber.

A typical liquid engine uses hydrogen as fuel and oxygen as oxidant; a typical solid propellant is nitroglycerine. In the liquid engine, the fuel and oxidant are stored separately at extremely low temperatures; in the solid engine, the fuel and oxidant are intimately mixed and loaded directly into the combustion chamber. A solid engine requires an ignition system, as does a liquid engine if the propellants do not ignite spontaneously on contact.

The efficiency of a rocket engine is defined as the percentage of the propellant's chemical energy that is converted into kinetic energy of the vehicle. During the first few seconds after liftoff, a rocket is extremely inefficient, for at least two unavoidable reasons: High power consumption is required to overcome the inertia of the nearly motionless mass of the fully fueled rocket; and in the lower atmosphere, power is wasted overcoming air resistance. Once the rocket gains altitude, however, it becomes more efficient. as the trajectory, at first vertical, curves into a suborbital arc or into the desired orbit.

Although all known rockets currently in use derive their energy from chemical reactions, more exotic propulsion systems are being considered. In ion propulsion, a plasma (ionized gas consisting of a mixture of positively charged atoms and negatively charged electrons) would be created by an electric discharge and then expelled by an electric field. The engine could provide a low thrust efficiently for long periods; on a lengthy flight this would produce very high velocities, so that if there is ever a trip to the outer planets an ion drive might be used. Deep Space 1, a space probe launched in 1998 to test new technologies, was propelled intermittently by an ion engine. Even nuclear power has been considered for propulsion; in fact, a nuclear ramjet was developed in the early 1960s before it was realized that because the exhaust gases would be highly radioactive such a drive could never be used in earth's atmosphere.

Design of the Exit Nozzle

A critical element in all rockets is the design of the exit nozzle, which must be shaped to obtain maximum energy from the exhaust gases moving through it. The nozzle usually converges to a narrow throat, then diverges to create a form which shapes the hypersonic flow of exhaust gas most efficiently. The walls of the combustion chamber and nozzle must be cooled to protect them against the heat of the escaping gases, whose temperature may be as high as 3,000&degC;—above the melting point of any metal or alloy.

Staging of Rockets

Although early rockets had only one stage, it was early recognized that no single-stage rocket can reach orbital velocity (5 mi/8 km per sec) or the earth's escape velocity (7 mi/11 km per sec). Hence multistage rockets, such as the two-stage Atlas-Centaur or the three-stage Saturn V, became necessary for space exploration. In these systems, two or more rockets are assembled in tandem and ignited in turn; once the lower stage's fuel is exhausted, it detaches and falls back to earth. Soviet systems clustered several rockets together, operated simultaneously, to obtain a large initial thrust.

Development of Rockets

The invention of the rocket is generally ascribed to the Chinese, who as early as A.D. 1000 stuffed gunpowder into sections of bamboo tubing to make military weapons of considerable effectiveness. The 13th-century English monk Roger BaconBacon, Roger,
c.1214–1294?, English scholastic philosopher and scientist, a Franciscan. He studied at Oxford as well as at the Univ. of Paris and became one of the most celebrated and zealous teachers at Oxford.
..... Click the link for more information. introduced to Europe an improved form of gunpowder, which enabled rockets to become incendiary projectiles with a relatively long range. Rockets subsequently became a common if unreliable weapon. Major progress in design resulted from the work of William Congreve, an English artillery expert, who built a 20-lb (9-kg) rocket capable of traveling up to 2 mi (3 km). In the late 19th cent., the Austrian physicist Ernst MachMach, Ernst
, 1838–1916, Austrian physicist and philosopher, b. Moravia. He taught (1864–67) mathematics at Graz and later, until his retirement in 1901, was professor of physics at Prague and Vienna.
..... Click the link for more information. gave serious theoretical consideration to supersonic speeds and predicted the shock wave that causes sonic boom.

The astronautical use of rockets was cogently argued in the beginning of the 20th cent. by the Russian Konstantin E. TsiolkovskyTsiolkovsky, Konstantin Eduardovich
, 1857–1935, Russian inventor and rocket expert. He lost his hearing in childhood, and, as he could not attend the usual schools, he educated himself.
..... Click the link for more information. , who is sometimes called the "father of astronautics." He pointed out that a rocket can operate in a vacuum and suggested that multistage liquid-fuel rockets could escape the earth's gravitation. The greatest name in American rocketry is Robert H. GoddardGoddard, Robert Hutchings,
1882–1945, American physicist and rocket expert, b. Worcester, Mass., grad. Worcester Polytechnic Institute (B.S., 1908), Ph.D. Clark Univ., 1911. From 1914 he was associated with Clark Univ., becoming a professor of physics in 1919.
..... Click the link for more information. , whose pamphlet A Method for Reaching Extreme Altitudes anticipated nearly all modern developments. Goddard launched the first liquid-fuel rocket in 1926 and demonstrated that rockets could be used to carry scientific apparatus into the upper atmosphere. His work found its most receptive audience in Germany. During World War II, a German team under Wernher von Braunvon Braun, Wernher
, 1912–77, German-American rocket scientist and astronautics engineer, b. Germany, grad. Berlin Technological Institute (B.S., 1932), Univ. of Berlin (Ph.D., 1934).
..... Click the link for more information. developed the V-2 rocket, which was the first long-range guided missile. The V-2 had a range greater than 200 mi (322 km) and reached velocities of 3,500 mi (5,600 km) per hr.

After the war, rocket research in the United States and the Soviet Union intensified, leading to the development first of intercontinental ballistic missiles and then of modern spacecraft. Important U.S. rockets have included the Redstone, Jupiter, Atlas, Titan, Agena, Centaur, and Saturn carriers. Saturn V, the largest rocket ever assembled, developed 7.5 million lb (3.4 million kg) of thrust. A three-stage rocket, it stood 300 ft (91 m) high exclusive of payload and with the Apollo delivered a payload of 44 tons to the moon. The space shuttlespace shuttle,
reusable U.S. space vehicle (1981–2011). Developed by the National Aeronautics and Space Administration (NASA) and officially known as the Space Transportation System (STS), it was the world's first reusable spacecraft that carried human beings into earth
..... Click the link for more information. , or STS (1981–2011), had main engines that used liquid propellant and boosters that were solid-fuel rockets.

Rockets presently being used to launch manned and unmanned missions into space include the Brazilian VSV-30; the Chinese Long March 2C, 2E, and 2F; the European Space Agency's Ariane 5 series and Vega; the Indian PSLV (Polar Satellite Launch Vehicle), GSLV (Geosynchronous Satellite Launch Vehicle), and GSLV Mark-III; the Israeli Shavit 2; the Russian Soyuz U, FG, and 2 and Proton K and M; the Japanese H-IIA, H-IIB, and Epsilon; the South Korean–Russian KSLV-1; the U.S. Athena 1 and 2, Taurus, Titan 2 and 4B, Delta 2, 3, and 4, and Atlas 2 ,3, and 5; the multinational, private Sea Launch Zenit-3SL, which uses a converted oil platform located some 1,400 mi (2,250 km) southeast of Hawaii; Rocket Lab's Electron; and Space Exploration Technologies' (SpaceX) Falcon 9 and Falcon Heavy and Orbital ATK's Antares, some of which are used to launch resupply capsulses to the International Space Station. In 2015 the Falcon 9's main stage achieved a controlled return landing. The Ares I, a two-stage NASA rocket designed to replace the STS as a launch vehicle on manned missions, underwent its first test flight in 2009. Blue Origin's New Shepard, consisting of a capsule and a reusable rocket booster, which also is designed to land vertically under power, had its first successful test in 2015.

See also space sciencespace science,
body of scientific knowledge as it relates to space exploration; it is sometimes also called astronautics. Space science draws on the conventional sciences of physics, chemistry, biology, and engineering, as well as requiring specific research of its own.
..... Click the link for more information. .

Bibliography

See G. P. Sutton, Rocket Propulsion Elements: An Introduction to the Engineering of Rockets (6th ed. 1992); F. H. Winter, Rockets into Space (1993); D. Baker, Spaceflight and Rocketry: A Chronology (1996); M. Stoiko, Pioneers of Rocketry (1997); R. Snedden, Rockets and Space (1998).

rocket,

in botany, popular name for several plants of the family Cruciferae (or Brassicaceae; mustardmustard,
common name for the Cruciferae, or Brassicaceae, a large family chiefly of herbs of north temperate regions. The easily distinguished flowers of the Cruciferae have four petals arranged diagonally ("cruciform") and alternating with the four sepals.
..... Click the link for more information. family). The dame's, or damask, violet, damewort, or sweet rocket is Hesperis matronalis, a hardy, herbaceous Old World perennial with four-petaled flowers, ranging from white to purple, that are especially fragrant in the evening. It grows wild in many parts of North America, where it has escaped from gardens. Rocket salad (Eruca sativa) is the roquette of France and Italy and is a coarse, weedy plant with whitish or creamy-yellow flowers that have an orange-blossom odor. Also known as tira and garden rocket, it is cultivated for salads. Yellow rocket (Barbarea vulgaris) is the name for a variety of winter cress or upland cress, a weedy plant sometimes cultivated for salads. Among the North American wildflowers called rocket are the prairie-rocket (Erysimum asperum), the purple rocket (Iodanthus pinnatifidus), and the sea rocket (Cakile edulenta). The latter, like related European species, grows along seacoasts. The unrelated dyer's rocket, or dyer's-weed, is Reseda luteola, a species of mignonettemignonette
, common name for some members of the Resedaceae, a small family of herbs and a few shrubs inhabiting arid regions. The main genus, the mignonettes (genus Reseda
..... Click the link for more information. . Rockets are classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
..... Click the link for more information. , class Magnoliopsida, order Capparales (or Brassicales), family Cruciferae (or Brassicaceae).

rocket

(rok -it) See launch vehicle; sounding rocket.

Rocket

a flight vehicle propelled through space by the reactive thrust that occurs when the rocket ejects a portion of its own mass (the working fluid).

A typical rocket includes the following subassemblies: one or more rocket engines, a source of primary energy, a store of working fluid, and a payload. No ambient medium is needed for rocket flight; this factor renders the rocket the only suitable vehicle for space flights. The basic energy and operating characteristics of a rocket depend on the type of rocket engine and the type of fuel. Practically all modern rockets have engines that operate on a chemical fuel. The thrust developed by the rocket engine and the exhaust velocity of the reactive jet are of primary importance in a rocket; the thrust of the rocket engines used to launch spacecraft can reach 10 meganewtons, and the exhaust velocity of the reactive jet is between 3,000 and 4,500 m/sec.

Rockets are used for military purposes and scientific research and also for launching spacecraft. They may be unguided, as in some types of antitank, antiaircraft, and aircraft missiles, or guided. Guided missiles are equipped with devices that force the missile to alter its motion during flight. Guided ballistic rockets include rockets that use their own flight momentum over a major portion of their trajectories after shutting off the engine; for example, within the earth’s gravitational field a rocket moves along a curve that is part of an ellipse and is called a ballistic curve (seeBALLISTICS).

Depending on their major structural features, rockets may be classified as single-stage or multistage rockets. A modern single-stage rocket usually consists of a nose section, an instrument section, a fuel section, and an engine section. The nose section contains the payload (in military rockets this is an explosive charge), and the instrument section contains the guidance systems and other instruments. In contradistinction to liquid-propellant rockets, solid-propellant rockets feature integrated fuel and engine sections, because the entire fuel supply is housed within the engine chamber.

L. A. GIL’BERG

What does it mean when you dream about a rocket?

A rocket in a dream may symbolize that the dreamer’s ideas or plans are about to take off like a rocket, very rapidly achieving orbit and bringing the dreamer the success he or she has been working for.

rocket

[′räk·ət] (aerospace engineering) Any kind of jet propulsion capable of operating independently of the atmosphere. A complete vehicle driven by such a propulsive system.

rocket

1. a Mediterranean plant, Eruca sativa, having yellowish-white flowers and leaves used as a salad: family Brassicaceae (crucifers) 2. any of several plants of the related genus Sisymbrium, esp S. irio (London rocket), which grow on waste ground and have pale yellow flowers 3. yellow rocket any of several yellow-flowered plants of the related genus Barbarea, esp B. vulgaris 4. sea rocket any of several plants of the related genus Cakile, esp C. maritima, which grow along the seashores of Europe and North America and have mauve, pink, or white flowers 5. dame's rocket another name for dame's violet See also dyer's rocket wall rocket

rocket

rock·et 1

rock·et 2

rocket

rocket

rock•et1

rock•et2

rock·et

rocket

rocket

rocket

rocket

rocket

rocket

rocket

rocket

rocket

rocket,

Rocket Propulsion

Rocket Design

Rocket Propellants

Design of the Exit Nozzle

Staging of Rockets

Development of Rockets

Bibliography

rocket,

rocket

Rocket

What does it mean when you dream about a rocket?

rocket

rocket

ROCKET

rocket

Synonyms for rocket

noun missile

Synonyms

verb escalate

Synonyms

verb zoom

Synonyms

Synonyms for rocket

verb to move swiftly

Synonyms

verb to rise abruptly and precipitously

Synonyms

Synonyms for rocket

noun any vehicle self-propelled by a rocket engine

Synonyms

Related Words

noun a jet engine containing its own propellant and driven by reaction propulsion

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noun erect European annual often grown as a salad crop to be harvested when young and tender

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noun propels bright light high in the sky, or used to propel a lifesaving line or harpoon

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noun sends a firework display high into the sky

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verb shoot up abruptly, like a rocket

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verb propel with a rocket

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rock·et¹

rock·et²

rock•et¹

rock•et²