English

Definition of pepsin noun from the Oxford Advanced Learner's Dictionary

 

pepsin

 noun
noun
BrE BrE//ˈpepsɪn//
 
; NAmE NAmE//ˈpepsɪn//
 
[uncountable] (biology)
 
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a substance in the stomach that breaks down proteins in the process of digestion Word Originmid 19th cent.: from Greek pepsis ‘digestion’ + -in.
See the Oxford Advanced American Dictionary entry: pepsin