retinol

[ ret-n-awl, -ol ]

/ ˈrɛt nˌɔl, -ˌɒl /

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noun

vitamin A.

Chemistry. a yellowish oil, C32H16, obtained by the distillation of resin, used as a solvent and as an antiseptic.

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Origin of retinol

1830–40; <Greek rhētī́n(ē) resin + -ol¹

Words nearby retinol

retinite, retinitis, retinitis pigmentosa, retinoblastoma, retinoid, retinol, retinopathy, retinoscope, retinoscopy, retinue, retinula

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use retinol in a sentence

If you’ve never used a retinol before, start by applying sparingly every second or third night for the first two weeks.
ABC’s of Skin Health: Get to Know the Skincare Ingredients That Go Into the Science of Great Skin and How They Help Melanated Skin Types|Steven Psyllos|June 25, 2021|Essence.com
It's also the first-hand cream I've used that contains retinol, an ingredient more commonly found in pricey facial serums, which explains the $45 price tag on a 30ml tube.
I'm a Professional Hand Model – This Is The Best Hand Cream Ever|Amber Gibson|May 7, 2021|The Daily Beast
Retinol, ret′i-nol, n. a hydro-carbon oil used in printers' ink.
Chambers's Twentieth Century Dictionary (part 3 of 4: N-R)|Various

British Dictionary definitions for retinol

retinol

/ (ˈrɛtɪˌnɒl) /

noun

another name for vitamin A2

another name for rosin oil

Word Origin for retinol

C19: from Greek rhētinē resin + -ol 1

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for retinol

retinol

[ rĕt′n-ôl′ ]

See vitamin A.