prothrombin Hear it!

prothrombin definition

pro·throm·bin (-t̸hräm′bin)

noun

a factor in the blood plasma that combines with calcium to form thrombin during blood clotting: it is a precursor of thrombin and is synthesized by the liver in the presence of vitamin K

Etymology: pro- + thrombin

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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