Tretinoin
//tɹəˈtɪn.əʊ.ɪn// noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 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. uncountable, usually
Etymology
From tr(ans)- + retino(ic acid) + -in.
Related phrases
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.