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an intermediate in the metabolic pathway of arachidonic acid, formed from prostaglandin endoperoxides, and released from suitably stimulated platelets; the unstable form, thromboxane A2, is a potent inducer of platelet aggregation and constrictor of arterial smooth muscle.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
The formal parent of the thromboxanes; prostanoic acid in which the -COOH has been reduced to -CH3 and an oxygen atom has been inserted between carbons 11 and 12.
Farlex Partner Medical Dictionary © Farlex 2012
Any of several compounds, originally derived from prostaglandin precursors in platelets, that stimulate aggregation of platelets and constriction of blood vessels.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.