单词 | velocity |
释义 | velocity (once / 929 pages) n If your rocket is traveling at maximum velocity, it means it can't go any faster. Velocity is quickness of motion or action. A synonym is celerity; a simpler word is speed. In physics, velocity specifically refers to the measurement of the rate and direction of change in position of an object. It is a vector quantity that specifies both the speed of a body and its direction of motion. The noun velocity descends from Middle English velocite, from Old French, from Latin vēlōcitās, from vēlōx "fast." WORD FAMILYvelocity: hypervelocity, velocities USAGE EXAMPLESHis players don’t expect any dip in performance although they will be watching to see if Stafford’s passes lack the same velocity. Washington Times(Dec 15, 2016) Among those with at least 400 at-bats last season, Zimmerman was ninth in the major leagues in exit velocity. Washington Times(Dec 15, 2016) He seemed to throw accurately with a decent degree of velocity to teammates during the portion of practice that was open to reporters. Seattle Times(Dec 14, 2016) n distance travelled per unit time Syn|Hypo|Hyper speed angular velocity (physics) the rate of change of the angular position of a rotating body; usually expressed in radians per second or radians per minute airspeedthe speed of an aircraft relative to the air in which it is flying escape velocitythe minimum velocity needed to escape a gravitational field groundspeedthe speed of an aircraft relative to the ground hypervelocityexcessive velocity muzzle velocitythe velocity of a projectile as it leaves the muzzle of a gun peculiar velocityvelocity with respect to the local standard of rest radial velocityvelocity along the line of sight toward or away from the observer c, light speed, speed of lightthe speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second steerageway(nautical) the minimum rate of motion needed for a vessel to be maneuvered terminal velocitythe constant maximum velocity reached by a body falling through the atmosphere under the attraction of gravity rate a magnitude or frequency relative to a time unit |
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