isotretinoin [ahy-soh-tri-tin-oh-in, -oin] Word Origin noun Pharmacology.

  1. 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 British Dictionary definitions for isotretinoin isotretinoin noun

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

isotretinoin in Medicine isotretinoin [ī′sō-trĕt′n-oin] n.

  1. A chemical compound that inhibits the secretion of sebum and is used in the treatment of severe forms of acne.

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