PEPSINS
Noun
pepsins
plural of pepsin
Source: Wiktionary
PEPSIN
Pep"sin, n. Etym: [Gr. pepsine. Cf. Dyspepsia.] (Physiol. Chem.)
Definition: An unorganized proteolytic ferment or enzyme contained in the
secretory glands of the stomach. In the gastric juice it is united
with dilute hydrochloric acid (0.2 per cent, approximately) and the
two together constitute the active portion of the digestive fluid. It
is the active agent in the gastric juice of all animals.
Note: As prepared from the glandular layer of pigs' or calves'
stomachs it constitutes an important article of pharmacy.
Source: Webster’s Unabridged Dictionary 1913 Edition