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idiosyncratic

[id-ee-oh-sin-krat-ik, -sing-]
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adjective
  1. pertaining to the nature of idiosyncrasy, or something peculiar to an individual: The best minds are idiosyncratic and unpredictable as they follow the course of scientific discovery.
Related formsid·i·o·syn·crat·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for idiosyncratically

idiosyncratic

adjective
  1. of or relating to idiosyncrasy; characteristic of a specific person
Derived Formsidiosyncratically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for idiosyncratically

idiosyncratic

n.

1779, from idiosyncrasy + -ic. Earlier in same sense was idiosyncratical (1640s). Related: Idiosyncratically.

Online Etymology Dictionary, © 2010 Douglas Harper