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Từ điển WordNet v3.1 - WordNet Dictionary
retardation


noun
1. a decrease in rate of change (Freq. 1)
- the deceleration of the arms race
Syn:
deceleration, slowing
Ant:
acceleration (for: deceleration)
Derivationally related forms:
retard, slow (for: slowing), decelerate (for: deceleration)
Hypernyms:
change, alteration, modification
2. the extent to which something is delayed or held back
Derivationally related forms:
retard
Hypernyms:
delay, hold, time lag, postponement, wait
3. the act of slowing down or falling behind
Syn:
slowdown, lag
Derivationally related forms:
retard, lag (for: lag), slow down (for: slowdown)
Hypernyms:
delay, holdup
4. any agent that retards or delays or hinders
- flame-retardant
Syn:
retardant, retardent
Derivationally related forms:
retard
Hypernyms:
agent
5. lack of normal development of intellectual capacities
Syn:
mental retardation, backwardness, slowness, subnormality
Derivationally related forms:
subnormal (for: subnormality), slow (for: slowness), backward (for: backwardness), retard
Hypernyms:
stupidity
Hyponyms:
abnormality, mental defectiveness, moronity, mental deficiency, idiocy,
amentia, imbecility

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