autacoid
American Heritage Dictionary:
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au·ta·coid
also au·to·coid (ô'tə-koid') 
n.
An organic substance, such as a hormone, produced in one part of an organism and transported by the blood, lymph, or sap to another part of the organism where it exerts a physiologic effect on that part.
n.
An organic substance, such as a hormone, produced in one part of an organism and transported by the blood, lymph, or sap to another part of the organism where it exerts a physiologic effect on that part.
[AUT(O)- + Greek akos, cure + -OID.]
autacoidal au'ta·coi'dal (-koid'l) adj.
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Word Tutor:
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autocoid
IN BRIEF: n. - Any physiologically active internal secretion especially one of uncertain classification.
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Oxford Dictionary of Biochemistry:
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autacoid
any druglike principle that is produced in or can be extracted from the organs of internal secretion. Autacoids include both excitatory substances (hormones) and inhibitory substances (chalones).
| aut+, aurosome, auriculin | |
| auto+, autoagglutination, autoallergy |
Saunders Veterinary Dictionary:
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autacoid
A term once proposed to replace the term hormone and recently suggested as a general term for various physiologically active, endogenous substances (histamine, serotonin, angiotensin, prostaglandins, etc.) that do not yet fit into existing functional classifications.
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American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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American Heritage Stedman's Medical Dictionary
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company.
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Oxford Dictionary of Biochemistry
Oxford University Press. Oxford Dictionary of Biochemistry and Molecular Biology © 1997, 2000, 2006 All rights reserved.
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