Medical Dictionary
retinoic acid
noun ret·i·no·ic acid \ˌret-ən-ˌō-ik-\
Medical Definition of RETINOIC ACID
: either of two isomers of an acid C20H28O2 derived from vitamin A and used especially in the treatment of acne: a or all–trans–retinoic acid : tretinoin b or 13–cis–retinoic acid : isotretinoin
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