Meaning of idiosyncrasy

id•i•o•syn•cra•sy

Pronunciation: (id"ē-u-sing'kru-sē, -sin'-), [key]
— pl. -sies.
  1. a characteristic, habit, mannerism, or the like, that is peculiar to an individual.
  2. the physical constitution peculiar to an individual.
  3. a peculiarity of the physical or the mental constitution, esp. susceptibility toward drugs, food, etc. Cf. allergy (def. 1).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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