[ ath-i-toh-sis ]
/ ˌæθ ɪˈtoʊ sɪs /

noun Pathology.

a condition, chiefly in children, of slow, involuntary, wormlike movements of the fingers, toes, hands, and feet, usually resulting from a brain lesion.


Origin of athetosis

1870–75; < Greek áthet(os) not placed (a- a-6 + thetós, equivalent to the- (stem of tithénai to set, put) + -tos verbid suffix) + -osis
Related formsath·e·to·sic, ath·e·tot·ic [ath-i-tot-ik] /ˌæθ ɪˈtɒt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for athetosis

British Dictionary definitions for athetosis


/ (ˌæθəˈtəʊsɪs) /


pathol a condition characterized by uncontrolled rhythmic writhing movement, esp of fingers, hands, head, and tongue, caused by cerebral lesion
Derived Formsathetoid, adjective

Word Origin for athetosis

C19: from Greek athetos not in place, from a- 1 + tithenai to place
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 athetosis



1871, from Greek athetos "not fixed, without position or place, set aside" + -osis. Coined by U.S. nerve specialist William Alexander Hammond (1828-1900).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for athetosis


[ ăth′ĭ-tōsĭs ]


A constant succession of slow, writhing, involuntary movements of flexion, extension, pronation, and supination of fingers and hands, and sometimes of toes and feet.
Related formsathe•toid′ null null adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.