Main Entry:

pep·sin

Pronunciation:

\ˈpep-sən\

Function:

noun

Etymology:

German, from Greek pepsis digestion, from pessein

Date:

circa 1844

1 : a protease of the stomach that breaks down most proteins to polypeptides 2 : a preparation containing pepsin that is obtained from the stomach especially of the hog and is used especially as a digestive aid