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Definition of: retardation
(rē′tär·dā′shən) noun
1. The act of retarding.
2. The state of being retarded.
3. A lessening of velocity, gain, or progress; a delaying.
4. The amount of delay or hindrance effected.
5. That which retards; a hindrance.
6. Slowness.
7. Music A gradual slackening of the time. [<L retardatio, -onis]
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