Definition of tretinoin in English:

tretinoin

noun

Medicine
  • [mass noun] A preparation of retinoic acid, applied to the skin to treat acne and other disorders.

    • ‘Both retinol and tretinoin can cause redness and irritation, but retinol's side effects are usually milder.’
    • ‘Topical retinoids such as tretinoin or adapalene are effective in many patients with comedonal acne.’
    • ‘These data suggest that topical tretinoin is a useful agent in the treatment of steroid-induced acne.’
    • ‘Like tretinoin, adapalene may cause skin irritation and initial exacerbation of acne lesions.’
    • ‘In patients with comedonal acne, it may be best to initiate treatment with tretinoin or adapalene.’

Origin

1970s: from t- of unknown origin + retinoic acid + -in.

Pronunciation:

tretinoin

/trəˈtɪnəʊɪn/