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retardation
6 dictionary results for: Retardation
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
re·tar·da·tion       [ree-tahr-dey-shuhn] Pronunciation Key
–noun
1.the act of retarding or state of being retarded.
2.something that retards; hindrance.
3.slowness or limitation in intellectual understanding and awareness, emotional development, academic progress, etc.
4.Music. a form of suspension that is resolved upward.
Also, re·tard·ment       [ri-tahrd-muhnt] Pronunciation Key.


[Origin: 1400–50; late ME retardacioun < L retardātiōn- (s. of retardātiō), equiv. to retardāt(us) (see retard, -ate1) + -iōn- -ion]

re·tard·a·tive       [ri-tahr-duh-tiv] Pronunciation Key, re·tard·a·to·ry       [ri-tahr-duh-tawr-ee, -tohr-ee] Pronunciation Key, adjective
American Heritage Dictionary - Cite This Source - Share This
re·tar·da·tion       (rē'tär-dā'shən)  Pronunciation Key 
n.  
    1. The act or process of retarding.
    2. The condition of being retarded.
  1. The extent to which something is held back or delayed.
  2. Something that retards; a delay or hindrance.
  3. Mental retardation.
  4. Music A diminishing of tempo; a retard.

Online Etymology Dictionary - Cite This Source - Share This
retardation 
1426, "fact or action of making slower in movement or time," from L. retardationem, from retardare "to make slow, delay, keep back, hinder," from re-, intensive prefix, + tardare "to slow" (see tardy). Retarded "mentally slow" first recorded 1895. Retard (v.) first recorded 1489, from O.Fr. retarder (13c.); offensive noun meaning "stupid person" (with accent on first syllable) is from 1960s slang.

WordNet - Cite This Source - Share This
retardation

noun
1. a decrease in rate of change; "the deceleration of the arms race" [syn: deceleration] [ant: acceleration
2. the extent to which something is delayed or held back 
3. any agent that retards or delays or hinders; "flame-retardant" [syn: retardant
4. lack of normal development of intellectual capacities 
5. the act of slowing down or falling behind [syn: slowdown

American Heritage Stedman's Medical Dictionary - Cite This Source - Share This

retardation re·tar·da·tion (rē'tär-dā'shən)
n.

  1. The condition of being relatively slow in mental, emotional, or physical development.
  2. The extent to which something is held back or delayed.
  3. Mental retardation.

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

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.

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