i·so·tre·ti·noin (ī'sō-trĕt'n-oin')
n.
A synthetic retinoid, C₂₀H₂₈O₂, that inhibits sebaceous gland secretion and is used in the treatment of severe forms of acne.

[ISO- + tretinoin, retinoic acid (T(RANS)- + RETINO(IC ACID) + -IN).]

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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