Idiosyncrasy Definition

ĭdē-ō-sĭngkrə-sē
idiosyncrasies
noun
idiosyncrasies
The temperament or mental constitution peculiar to a person or group.
Webster's New World
Any personal peculiarity, mannerism, etc.
Webster's New World
An individual reaction to a drug, food, etc. that is different from the reaction of most people.
Webster's New World

Other Word Forms of Idiosyncrasy

Noun

Singular:
idiosyncrasy

Origin of Idiosyncrasy

  • First attested in 1604, in modern sense since 1665, from Old French idiosyncrasie, from Ancient Greek ἰδιοσυγκρασία (idiosunkrasia, “one’s own temperament”), from ἴδιος (idios, “one’s own”) + σύν (sun, “together”) + κρᾶσις (krasis, “temperament”).

    From Wiktionary

  • Greek idiosunkrāsiā idio- idio- sunkrāsis mixture, temperament (sun- syn-) (krāsis a mixing kerə- in Indo-European roots)

    From American Heritage Dictionary of the English Language, 5th Edition

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