Etymology
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trypsin (n.)

chief digestive enzyme of pancreatic juice, 1876, coined 1874 by German physiologist Wilhelm Friedrich Kühne (1837-1900), apparently from Greek tripsis "rubbing, friction" (from tribein "to rub, rub down, wear away," from PIE root *tere- (1) "to rub, turn") + chemical suffix -in (2). Said to be so called because it first was obtained (in 1862) by rubbing the pancreas with glycerin.

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Definitions of trypsin

trypsin (n.)
an enzyme of pancreatic origin; catalyzes the hydrolysis of proteins to smaller polypeptide units;
From wordnet.princeton.edu