idiosyncrasy

idiosyncrasy

[id-ee-uh-sing-kruh-see, -sin-]
noun, plural 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, especially susceptibility toward drugs, food, etc. Compare allergy ( def 1 ).
Also, idiocrasy.


Origin:
1595–1605; < Greek idiosynkrāsía, equivalent to idio- idio- + syn- syn- + krâs(is) a blending + -ia -y3

idiosyncratic [id-ee-oh-sin-krat-ik, -sing-] , adjective


1. peculiarity, quirk. See eccentricity.
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World English Dictionary
idiosyncrasy (ˌɪdɪəʊˈsɪŋkrəsɪ)
 
n , pl -sies
1.  a tendency, type of behaviour, mannerism, etc, of a specific person; quirk
2.  the composite physical or psychological make-up of a specific person
3.  an abnormal reaction of an individual to specific foods, drugs, or other agents
 
[C17: from Greek idiosunkrasia, from idio- + sunkrasis mixture, temperament, from sun-syn- + kerannunai to mingle]

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Etymonline
Word Origin & History

idiosyncrasy
c.1600, from Fr. idiosyncrasie, from Gk. idiosynkrasia "a peculiar temperament," from idios "one's own" (see idiom) + synkrasis "temperament, mixture of personal characteristics," from syn "together" + krasis "mixture." Originally in English a medical term meaning "physical
constitution of an individual." Mental sense first attested 1660s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

idiosyncrasy id·i·o·syn·cra·sy (ĭd'ē-ō-sĭng'krə-sē)
n.

  1. A structural or behavioral trait peculiar to an individual or a group.

  2. A physiological or temperamental peculiarity.

  3. An unusual individual reaction to food or a drug.


id'i·o·syn·crat'ic (-sĭn-krāt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
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