[ ahy-soh-tri-tin-oh-in, -oin ]
/ ˌaɪ soʊ trɪˈtɪn oʊ ɪn, -ɔɪn /

noun Pharmacology.

a yellowish-orange to orange crystalline powder, C20H28O2, used in the treatment of cystic acne.

Origin of isotretinoin

iso- + tretinoin a name for retinoic or Vitamin A acid, equivalent to t- (of uncertain derivation) + retino(ic acid) (retin(ol) + -o- + -ic) + -in2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for isotretinoin

/ (ˌaɪsəʊtrəˈtɪnəʊɪn) /


a drug related to vitamin A, used to treat severe acne that has failed to respond to other treatment
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

Medicine definitions for isotretinoin

[ ī′sō-trĕtn-oin ]


A chemical compound that inhibits the secretion of sebum and is used in the treatment of severe forms of acne.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.