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elerated; increase of motion or action; as, a falling body moves toward the earth with an acceleration of velocity; -- opposed to retardation. A period of social improvement, or of intellectual advancement, contains within itself a principle of acceleration. I. Taylor. (Astr. & Physics.) Acceleration of the moon, the i…

Relating to acceleration; adding to velocity; quickening. Reid.

A diseased state of the system, marked by increased heat, acceleration of the pulse, and a general derangement of the functions, including usually, thirst and loss of appetite. Many diseases, of which fever is the most prominent symptom, are denominated fevers; as, typhoid fever; yellow fever.

Mach.), a heavy wheel attached to machinery to equalize 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 bal…

At or during a given instant; as, instantaneous acceleration, velocity, etc. Instantaneous center of rotation (Kinematics), in a plane or in a plane figure which has motions both of translation and of rotation in the plane, is the point which for the instant is at rest. -- Instantaneous axis of rotation (Kinematics),…

e, in the first and third quarters of the moon; -- opposed to priming of the tide, or the acceleration of the time of high water, in the second and fourth quarters; depending on the relative positions of the sun and moon. -- Lag screw, an iron bolt with a square head, a sharp-edged thread, and a sharp point, adapted f…

h is longer than it is broad, and with right angles. Parallelogram of velocities, forces, accelerations, momenta, etc. (Mech.), a parallelogram the diagonal of which represents the resultant of two velocities, forces, accelerations, momenta, etc., both in quantity and direction, when the velocities, forces, acceleratio…

gram-meters of energy per second. One poncelet equals g watts, when g is the value of the acceleration of gravity in centimeters.

nce; the act of delaying; as, the retardation of the motion of a ship; -- opposed to Ant: acceleration. The retardations of our fluent motion. De Quinsey.

, one another. A retardation from this cause is called the lagging of the tide, while the acceleration of the recurrence of high water is termed the priming of the tide. See Lag of the tide, under 2d Lag. -- Tide dial, a dial to exhibit the state of the tides at any time. -- Tide gate. (a) An opening through which wa…

-- in the former case called accelerated velocity, in the latter, retarded velocity; the acceleration or retardation itself being also either uniform or variable. -- Virtual velocity. See under Virtual.