[ik-sen-trik, ek-]



Also especially British, ex·cen·tric.

Origin of eccentric

1350–1400; < Medieval Latin eccentricus < Greek ékkentr(os) out of center (see ec-, center) + Latin -icus -ic
Related formsec·cen·tri·cal, adjectiveec·cen·tri·cal·ly, adverbnon·ec·cen·tric, adjectivenon·ec·cen·tri·cal·ly, adverbun·ec·cen·tric, adjectiveun·ec·cen·tri·cal·ly, adverb

Synonyms for eccentric

Antonyms for eccentric Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for eccentric

Contemporary Examples of eccentric

Historical Examples of eccentric

British Dictionary definitions for eccentric



deviating or departing from convention, esp in a bizarre manner; irregular or odd
situated away from the centre or the axis
not having a common centreeccentric circles Compare concentric
not precisely circular


a person who deviates from normal forms of behaviour, esp in a bizarre manner
a device for converting rotary motion to reciprocating motion
Derived Formseccentrically, adverb

Word Origin for eccentric

C16: from Medieval Latin eccentricus, from Greek ekkentros out of centre, from ek- ex- 1 + kentron centre
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 eccentric

early 15c., "eccentric circle or orbit," originally a term in Ptolemaic astronomy, "circle or orbit not having the Earth precisely at its center," from Middle French eccentrique and directly from Medieval Latin eccentricus (noun and adjective), from Greek ekkentros "out of the center" (as opposed to concentric), from ek "out" (see ex-) + kentron "center" (see center (n.)). Meaning "odd or whimsical person" attested by 1824.

June 4 [1800].--Died in the streets in Newcastle, William Barron, an eccentric, well known for many years by the name of Billy Pea-pudding. [John Sykes, "Local Records, or Historical Register of Remarkable Events which have Occurred Exclusively in the Counties of Durham and Northumberland, Town and County of Newcastle Upon Tyne, and Berwick Upon Tweed," Newcastle, 1824]

1550s, from Middle French eccentrique and directly from Medieval Latin eccentricus (noun and adjective; see eccentric (n.)). Figurative sense of "odd, whimsical" first recorded 1620s.

Online Etymology Dictionary, © 2010 Douglas Harper

eccentric in Medicine


[ĭk-sĕntrĭk, ĕk-]


Departing from a recognized, conventional, or established norm or pattern.
Situated or proceeding away from the center.


A person of odd or unconventional behavior.
Related formsec′cen•trici•ty (ĕk′sĕn-trĭsĭ-tē) n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.