tre·​tin·​o·​in | \ tre-ˈti-nə-win How to pronounce tretinoin (audio) \

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

Examples of tretinoin in a Sentence

Recent Examples on the Web Retinoids: Retinol, retinal, tretinoin, and the like are all topical retinoids, which are forms of vitamin A. These can speed up the skin’s cell turnover process, Stevenson explains, which helps treat acne as well as signs of aging, like fine lines. Sarah Jacoby, SELF, "PSA: It’s Totally Fine and Normal to Have Visible Pores on Your Face," 23 July 2019 The best way to explain my avoidance is that my previously acne-prone self was introduced to retinol through its prescription cousin, Retin-A, also known as tretinoin or retinoic acid. Sarah Wu, Glamour, "Kate Somerville’s Glow-Boosting Moisturizer Cured My Fear of Retinol," 19 Aug. 2019 For example, retinoids such as tretinoin and isotretinoin are a no-no during pregnancy because they have been linked to birth defects. Nikhita Mahtani, SELF, "How to Safely Treat Your Postpartum Acne," 24 Apr. 2019 Prescription topical retinoids, like tretinoin, may also be an option recommended by your dermatologist. Allure, "The 14 Best Cystic Acne Treatments, According to Dermatologists," 28 Mar. 2019 As a refresher, most wrinkle creams are filled with your classic retinol or tretinoin, two of the strongest (and potentially irritating) topical retinoids. Chloe Metzger, Marie Claire, "The 5 Truly Excellent Beauty Products I'm Loving This Week," 10 Oct. 2018 Stop using skincare products with harsh ingredients, including glycolic and salicylic acids, benzoyl peroxide, and any retinoids (including tretinoin and adapalene), at least five days before your treatment. Deanna Pai, Glamour, "The Brown Girl's Guide to Laser Hair Removal," 20 Aug. 2018 Night cream + retinol: Lortscher says that your nightly retinol application can come in the form of creams with over-the-counter retinol or a prescription retinoid, such as tretinoin. Adam Hurly, GQ, "How to Fix Your Dehydrated Skin," 3 July 2018 Retinol and tretinoin should only be used at night. Dr. Leslie Baumann, miamiherald, "What you need to know about 'hazardous' sunscreen ingredients | Miami Herald," 27 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tretinoin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tretinoin

1970, in the meaning defined above

History and Etymology for tretinoin

perhaps from trans- + retinoic acid

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Time Traveler for tretinoin

Time Traveler

The first known use of tretinoin was in 1970

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Statistics for tretinoin

Last Updated

27 Nov 2019

Cite this Entry

“Tretinoin.” The Dictionary, Merriam-Webster Inc., Accessed 21 January 2020.

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tre·​tin·​o·​in | \ tre-ˈtin-ə-wən How to pronounce tretinoin (audio) \

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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