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Meaning of mucin

mu•cin

Pronunciation: (my'sin), [key]
— n. Biochem.
  1. any of a class of glycoproteins found in saliva, gastric juice, etc., that form viscous solutions and act as lubricants or protectants on external and internal surfaces of the body.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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