单词 | propulsion |
释义 | propulsion (once / 6900 pages) n The act of moving something forward is called propulsion. Propulsion is the force that pushes a rocket into space, that sends a football spiraling toward a receiver's hands, and that moves a strongly kicking swimmer through the water. The noun propulsion came from the Latin prōpellere, "to push away." The modern meaning of propulsion meaning "the act of moving forward" was first recorded in 1799. In water, flippers, fins, and the wind can aid propulsion. In a general sense, if society is to move forward, we must stop using fossil fuels as our main means of propulsion. WORD FAMILYpropulsion: propulsions+/propel: propellant, propelled, propellent, propeller, propelling, propellor, propels, propulsion, propulsive/propellant: propellants/propelled: self-propelled/propellent: propellents/propeller: propellers/propelling: self-propelling/propellor: propellors/propulsive: propulsively USAGE EXAMPLESThe littoral fleet is designed to operate close to shore with steerable jet propulsion. Washington Times(Dec 30, 2016) A similar dragnet at NASA’s Jet Propulsion Laboratory would yield plenty of genius-level fluid dynamicists responsible for computerized models of the Earth’s atmosphere. Slate(Dec 27, 2016) Listen to the start of “Superstition,” from Talking Book—among the most recognizable drum intros of all time, built entirely on Wonder’s funky propulsion. Slate(Dec 18, 2016) 1n the act of propelling Syn|Hypo|Hyper actuation launch, launching the act of propelling with force launchingthe act of moving a newly built vessel into the water for the first time drive, driving force, thrustthe act of applying force to propel something bowl, rollthe act of rolling something (as the ball in bowling) throwthe act of throwing (propelling something with a rapid movement of the arm and wrist) push, pushingthe act of applying force in order to move something away pull, pullingthe act of pulling; applying force to move something toward or with you heave, lift, raisethe act of raising something ejection, expulsion, forcing out, projectionthe act of expelling or projecting or ejecting jump, jumpingthe act of jumping; propelling yourself off the ground lobthe act of propelling something (as a ball or shell etc.) in a high arc rolling, wheelingpropelling something on wheels shooting, shotthe act of firing a projectile dribble, dribblingthe propulsion of a ball by repeated taps or kicks rocket firing, rocket launchingthe launching of a rocket or missile under its own power firewall(colloquial) the application of maximum thrust impetus, impulse, impulsionthe act of applying force suddenly bowling(cricket) the act of delivering a cricket ball to the batsman flingthe act of flinging heave, heavingthrowing something heavy (with great effort) cast, hurla violent throw leaner(horseshoes) the throw of a horseshoe so as to lean against (but not encircle) the stake flip, pass, toss(sports) the act of throwing the ball to another member of your team pitchthe action or manner of throwing something delivery, pitch(baseball) the act of throwing a baseball by a pitcher to a batter ringer(horseshoes) the successful throw of a horseshoe or quoit so as to encircle a stake or peg shya quick throw slingingthrowing with a wide motion (as if with a sling) throw-in(rugby) an act or instance of throwing a ball in to put it into play depressionpushing down jog, nudgea slight push or shake press, pressing, pressurethe act of pressing; the exertion of pressure shovethe act of shoving (giving a push to someone or something) dragthe act of dragging (pulling with force) draw, haul, haulagethe act of drawing or hauling something jerk, tuga sudden abrupt pull draft, draught, drawingthe act of moving a load by drawing or pulling deracination, excision, extirpationthe act of pulling up or out; uprooting; cutting off from existence pluckthe act of pulling and releasing a taut cord traction(orthopedics) the act of pulling on a bone or limb (as in a fracture) to relieve pressure or align parts in a special way during healing belch, belching, burp, burping, eructationa reflex that expels gas noisily from the stomach through the mouth belchingthe forceful expulsion of something from inside coughing upthe act of expelling (food or phlegm) by coughing expectoration, spit, spittingthe act of spitting (forcefully expelling saliva) disgorgement, emesis, puking, regurgitation, vomit, vomitingthe reflex act of ejecting the contents of the stomach through the mouth headera headlong jump (or fall) hopthe act of hopping; jumping upward or forward (especially on one foot) bounce, bound, leap, leaping, saltation, springa light, self-propelled movement upwards or forwards hurdle, vaultthe act of jumping over an obstacle jumping up and downjumping in one spot (as in excitement) shootthe act of shooting at targets countershota return shot; a retaliatory shot discharge, firing, firing offthe act of discharging a gun gunfire, gunshotthe act of shooting a gun headshota shot aimed at a person's head shellfireshooting artillery shells potshota shot taken at an easy or casual target (as by a pothunter) double dribblean illegal dribble in basketball (the player uses both hands to dribble or the player starts to dribble a second time after coming to a stop) capriole(dressage) a vertical jump of a trained horse with a kick of the hind legs at the top of the jump boostthe act of giving a push flipa sudden, quick movement act, deed, human action, human activity something that people do or cause to happen 2n a propelling force Hypo|Hyper nuclear propulsion the use of a nuclear reactor either to produce electricity to power an engine (as in a nuclear submarine) or to directly heat a propellant (as in nuclear rockets) reaction propulsionpropulsion that results from the ejection at high velocity of a mass of gas to which the vehicle reacts with an equal and opposite momentum jet propulsionpropulsion by means of the discharge of a jet of fluid toward the rear rocket propulsionreaction propulsion using stored oxygen for combustion; used where there is insufficient atmospheric oxygen force (physics) the influence that produces a change in a physical quantity |
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