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[puh-pey-in, -pahy-in] /pəˈpeɪ ɪn, -ˈpaɪ ɪn/
Biochemistry. a proteolytic enzyme found in the fruit of the papaya tree, Carica papaya.
Pharmacology. a commercial preparation of this used as a meat tenderizer and in medicine as a digestant.
Origin of papain
1885-90; papa(ya) + -in2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for papain
  • papain is used to dissociate cells in the first step of cell culture preparations.
  • The fda said, no topical drug product containing papain has been approved by the fda.
British Dictionary definitions for papain


/pəˈpeɪɪn; -ˈpaɪɪn/
a proteolytic enzyme occurring in the unripe fruit of the papaya tree, Carica papaya: used as a meat tenderizer and in medicine as an aid to protein digestion
Word Origin
C19: from papaya
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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papain in Medicine

papain pa·pa·in (pə-pā'ĭn, -pī'ĭn) or pa·pa·in·ase (-ə-nās', -nāz')
An enzyme, or a crude extract containing it, that digests protein, catalyzes the hydrolysis or transfer of esters, amides, or other chemical groups containing sulfur, and is used as a digestive aid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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