retinoic acid

[ rĕt′n-ōĭk ]

n.

An acid formed in the oxidation of retinaldehyde and used as a topical treatment for acne.vitamin A acid
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.