[ az-uh-thahy-uh-preen ]
/ ˌæz əˈθaɪ əˌprin /
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noun Pharmacology.

a cytotoxic purine analog, C9H7N7O2S, used as an immunosuppressive in organ transplantations and in rheumatoid arthritis and connective tissue disorders.



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Origin of azathioprine

1960–65; coinage apparently based on imidazol,thio-, and purine, parts of the chemical name
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for azathioprine

/ (ˌæzəˈθaɪəˌpriːn) /


a synthetic drug that suppresses the normal immune responses of the body and is administered orally during and after organ transplantation and also in certain types of autoimmune disease. Formula: C 9 H 7 N 7 O 2 S
C20: from aza- + thio- + p (u) rine
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

Medical definitions for azathioprine

[ ăz′ə-thīə-prēn′ ]


An immunosuppressive agent used especially to prevent organ rejection in kidney transplant recipients.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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