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Definition of: abnormal
(ab·nôr′məl) adjective
Not according to rule; different from the usual or average: unnatural; irregular. See synonyms under IRREGULAR. [Earlier anormal <F <Med.L anormalus, alter, of anomalus <Gk. anōmalos irregular; re-formed on Latin ab away, from]
—ab·nor′mal·ly adverb
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