Crossword Dictionary

What's The Definition Of Retardation?

\Re`tar*da"tion\, n. [L. retardatio: cf. F. retardation.] 1. The act of retarding; hindrance; the act of delaying; as, the retardation of the motion of a ship; -- opposed to {acceleration}. The retardations of our fluent motion. --De Quinsey. 2. That which retards; an obstacle; an obstruction. Hills, sloughs, and other terrestrial retardations. --Sir W. Scott. 3. (Mus.) The keeping back of an approaching consonant chord by prolonging one or more tones of a previous chord into the intermediate chord which follows; -- differing from suspension by resolving upwards instead of downwards. 4. The extent to which anything is retarded; the amount of retarding or delay. {Retardation of the tide}. (a) The lunitidal interval, or the hour angle of the moon at the time of high tide any port; the interval between the transit of the moon and the time of high tide next following. (b) The age of the tide; the retard of the tide. See under {Retard}, n.