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English to English noun
| 1 |
a decrease in rate of change |  | Example: the deceleration of the arms race
source: wordnet30
| 2 |
the extent to which something is delayed or held back |  | source: wordnet30
| 3 |
any agent that retards or delays or hinders |  | Example: flame-retardant
source: wordnet30
| 4 |
lack of normal development of intellectual capacities |  | source: wordnet30
| 5 |
the act of slowing down or falling behind |  | source: wordnet30
| 6 |
The act of retarding; hindrance; the act of delaying; as, the retardation of the motion of a ship; -- opposed to acceleration. |  | source: webster1913
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