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

To lessen the velocity or momentum of; to retard; as, to deaden a ship's headway.

the movement (opposing any sudden acceleration by its inertia and any retardation by its momentum), and to accumulate or give out energy for a variable or intermitting resistance. See Fly, n., 9. -- On the fly (Baseball), still in the air; -- said of a batted ball caught before touching the ground..…

is to be raised. When the rush of water through the main pipe d shuts the valve at a, the momentum of the current thus suddenly checked forces part of it into the air chamber b, and up the pipe c, its return being prevented by a valve at the entrance to the air chamber, while the dropping of the valve a by its own weig…

virtue of its weight and its motion; the force with which any body is driven or impelled; momentum.

Impulsive power; force; momentum. The moments or quantities of motion in bodies. Berkley. Touch, with lightest moment of impulse, His free will. Milton.

Of or pertaining to moment or momentum.

d from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the movements of clockwork and other machinery.

conceived as being without extension, yet having physical properties, as weight, inertia, momentum, etc.; a material point. -- Physical signs (Med.), the objective signs of the bodily state afforded by a physical examination.

ituting a proportion; having the same, or a constant, ratio; as, proportional quantities; momentum is proportional to quantity of matter. Proportional logarithms, logistic logarithms. See under Logistic. -- Proportional scale, a scale on which are marked parts proportional to the logarithms of the natural numbers; a l…

ict. ) -- Quantity of matter, in a body, its mass, as determined by its weight, or by its momentum under a given velocity. -- Quantity of motion (Mech.), in a body, the relative amount of its motion, as measured by its momentum, varying as the product of mass and velocity. -- Known quantities (Math.), quantities whos…

d upon. -- Rope pump, a pump in which a rapidly running endless rope raises water by the momentum communicated to the water by its adhesion to the rope. -- Rope transmission (Mach.), a method of transmitting power, as between distant places, by means of endless ropes running over grooved pulleys. -- Rope's end, a pi…

from the cylinder by some special means, as, in many four-cycle engines, by utilizing the momentum of the exhaust gases in a long exhaust pipe.

To move ahead by force of momentum, as a sailing vessel when the helm is put hard alee. To shoot ahead, to pass or move quickly forward; to outstrip others.