[ahy-soh-tri-tin-oh-in, -oin]

noun Pharmacology.

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

Nearby words

  1. isotope,
  2. isotope geology,
  3. isotopic number,
  4. isotopic spin,
  5. isotopy,
  6. isotron,
  7. isotropic,
  8. isotype,
  9. isotypic,
  10. isovalericacidemia

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



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




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.