• synonyms


[ aw-tuh-koid ]
/ ˈɔ təˌkɔɪd /

noun Physiology.

any physiologically active internal secretion, especially one of uncertain classification, as histamine or prostaglandin.

Nearby words

austronesia, austronesian, aut, aut caesar, aut nihil, aut-, autacoid, autarch, autarchy, autarky, autecic, autecious

Origin of autacoid

1910–15; aut- + Greek ák(os) remedy + -oid
Related formsau·ta·coi·dal, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for autacoid


/ (ˈɔːtəˌkɔɪd) /


physiol any natural internal secretion, esp one that exerts an effect similar to a drug

Word Origin for autacoid

C20: from auto- + Greek akos cure + -oid
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 autacoid



An organic substance, such as a hormone, produced in one part of an organism and transported by the blood or lymph to another part of the organism where it exerts a physiologic effect on that part.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.