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Dictionary

pro•throm•bin

Pronunciation: (prō-throm'bin), [key]
—n. Biochem.
a plasma protein involved in blood coagulation that on activation by factors in the plasma is converted to thrombin. Also called thrombogen.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

prothorax

protist

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