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pepsin

noun

pep·​sin ˈpep-sən How to pronounce pepsin (audio)
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

Example Sentences

Recent Examples on the Web Even that function is carried out by proteins like pepsin. Nathan Ahlgren, The Conversation, 13 Jan. 2021 In 2012, a lab study showed that water with a pH of 8.8 neutralized pepsin, the enzyme that causes damage to the esophagus in people with acid reflux. SELF, 6 Sep. 2018 That’s because plant protein is digested mostly in the intestines, while animal protein is digested in the stomach—which is also the point of production for pepsin. Alice Park, Time, 7 Sep. 2017

Word History

Etymology

German, from Greek pepsis digestion, from pessein

First Known Use

circa 1844, in the meaning defined at sense 1

Time Traveler
The first known use of pepsin was circa 1844
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