prothrombin: Meaning and Definition of

pro•throm•bin

Pronunciation: (prō-throm'bin), [key]
— n. Biochem.
  1. a plasma protein involved in blood coagulation that on activation by factors in the plasma is converted to thrombin. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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