Definition of tretinoin
: the all-trans isomer of retinoic acid that is applied to the skin to treat severe acne and reduce facial wrinkles, roughness, and pigmented spots
Origin of tretinoin
perhaps from trans- + retinoic acid
First Known Use: 1980
Medical Definition of tretinoin
: the all-trans isomer of retinoic acid that is applied topically to the skin to treat acne vulgaris and to reduce facial wrinkles, roughness, and pigmented spots and that is administered orally to induce remission of acute myelogenous leukemia in which more than half the cells are malignant promyelocytes—called also all-trans-retinoic acid, retinoic acid, vitamin A acid; see isotretinoin, retin-a
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Medical Dictionary: Definition of "tretinoin"
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