noun Physiology.

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

Nearby words

  1. austronesia,
  2. austronesian,
  3. aut,
  4. aut caesar, aut nihil,
  5. aut-,
  6. autarch,
  7. autarchy,
  8. autarky,
  9. autecic,
  10. 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



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.