a combining form meaning “proper to one,” “peculiar,” used in the formation of compound words: idiomorphic.

Origin of idio-

< Greek, combining form of ídios (one's) own, personal, private, separate, distinct Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for idio-


combining form

indicating peculiarity, isolation, or that which pertains to an individual person or thingidiolect

Word Origin for idio-

from Greek idios private, separate
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

Medicine definitions for idio-



One's own; private; personal:idiosyncrasy.
Distinct; separate:idioventricular.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.