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Trebucket :: Trebucket (n.) A military engine used in the Middle Ages for throwing stones, etc. It acted by means of a great weight fastened to the short arm of a lever, which, being let fall, raised the end of the long arm with great velocity, hurling stones with much force..

Speed :: Speed (n.) The act or state of moving swiftly; swiftness; velocity; rapidly; rate of motion; dispatch; as, the speed a horse or a vessel..

Myograph :: Myograph (n.) An instrument for determining and recording the different phases, as the intensity, velocity, etc., of a muscular contraction..

Hodograph :: Hodograph (n.) A curve described by the moving extremity of a line the other end of which is fixed, this line being constantly parallel to the direction of motion of, and having its length constantly proportional to the velocity of, a point moving in any path; -used in investigations respecting central forces..

Hydrometry :: Hydrometry (n.) The art or operation of measuring the velocity or discharge of running water, as in rivers, etc..

Cycloscope :: Cycloscope (n.) A machine for measuring at any moment velocity of rotation, as of a wheel of a steam engine..

Rapidity :: Rapidity (n.) The quality or state of being rapid; swiftness; celerity; velocity; as, the rapidity of a current; rapidity of speech; rapidity of growth or improvement..

Swift :: Swift (v. i.) Moving a great distance in a short time; moving with celerity or velocity; fleet; rapid; quick; speedy; prompt.

Twirl :: Twirl (v. i.) To revolve with velocity; to be whirled round rapidly.

Whirl :: Whirl (v. t.) A turning with rapidity or velocity; rapid rotation or circumvolution; quick gyration; rapid or confusing motion; as, the whirl of a top; the whirl of a wheel..

Haematachometry :: Haematachometry (n.) The measurement of the velocity of the blood.

Slip :: Slip (n.) The motion of the center of resistance of the float of a paddle wheel, or the blade of an oar, through the water horozontally, or the difference between a vessel's actual speed and the speed which she would have if the propelling instrument acted upon a solid; also, the velocity, relatively to still water, of the backward current of water produced by the propeller..

Pitot''s Tube :: Pitot's tube () A bent tube used to determine the velocity of running water, by placing the curved end under water, and observing the height to which the fluid rises in the tube; a kind of current meter..

Whirligig :: Whirligig (n.) A mediaeval instrument for punishing petty offenders, being a kind of wooden cage turning on a pivot, in which the offender was whirled round with great velocity..

Velocity :: Velocity (n.) Quickness of motion; swiftness; speed; celerity; rapidity; as, the velocity of wind; the velocity of a planet or comet in its orbit or course; the velocity of a cannon ball; the velocity of light..

Haemadromograph :: Haemadromograph (n.) An instrument for registering the velocity of the blood.

Instantaneous :: Instantaneous (a.) At or during a given instant; as, instantaneous acceleration, velocity, etc..

Momentum :: Momentum (n.) The quantity of motion in a moving body, being always proportioned to the quantity of matter multiplied into the velocity; impetus..

Rhysimeter :: Rhysimeter (n.) An instrument, acting on the principle of Pitot's tube, for measuring the velocity of a fluid current, the speed of a ship, etc..

Impetus :: Impetus (n.) The aititude through which a heavy body must fall to acquire a velocity equal to that with which a ball is discharged from a piece.

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