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retinol
noun
ret·i·nol
ˈre-tə-ˌnȯl
-ˌnōl
: the chief and typical vitamin A C20H29OH that is a highly unsaturated alicyclic alcohol used in various forms in medicine and nutrition
Examples of retinol in a Sentence
Recent Examples on the Web
L'Oreal told me my optimal skincare routine would include ceramides (for moisture), retinol, and a good sunscreen.
—Emily Forlini, PCMAG, 9 Jan. 2025
The ingredient is also responsible for stimulating collagen production and works well when paired with other finicky ingredients like retinol.
—Michelle Rostamian, Allure, 30 Dec. 2024
To reduce side effects, consider applying vitamin C in the morning and retinol at night.
—Sarah Bradley, Health, 24 Dec. 2024
Unlike with retinol, your skin doesn’t have to slowly build up a tolerance to the serum.
—Lauren Taylor, Southern Living, 19 Dec. 2024
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Word History
Etymology
retin- + -ol entry 1; from its being the source of retinal
First Known Use
1960, in the meaning defined above
Dictionary Entries Near retinol
Cite this Entry
“Retinol.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/retinol. Accessed 18 Jan. 2025.
Kids Definition
retinol
noun
ret·i·nol
ˈret-ᵊn-ˌȯl
-ˌōl
: the most common form of vitamin A
Medical Definition
retinol
noun
ret·i·nol
ˈret-ᵊn-ˌȯl
-ˌōl
More from Merriam-Webster on retinol
Britannica.com: Encyclopedia article about retinol
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