idiosyncratic /id'ee oh sin krat"ik, -sing-/, adj.idiosyncratically, adv.
/id'ee euh sing"kreuh see, -sin"-/, n., pl. idiosyncrasies.
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).
Also, idiocrasy.
[1595-1605; < Gk idiosynkrasía, equiv. to idio- IDIO- + syn- SYN- + krâs(is) a blending + -ia -Y3]
Syn. 1. peculiarity, quirk. See eccentricity.

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Universalium. 2010.