retinol

[ ret-n-awl, -ol ]

noun

1. vitamin A.
2. Chemistry. a yellowish oil, C 3 2 H 1 6 , obtained by the distillation of resin, used as a solvent and as an antiseptic.

retinol

/ ˈrɛtɪˌnɒl /

noun

1. See vitamin A2
   another name for vitamin A2
2. See rosin oil
   another name for rosin oil

retinol

/ rĕt′n-ôl′ /

1. See vitamin A

Word History and Origins

Origin of retinol¹

First recorded in 1830–40; from Greek rhētī́n(e) “resin” ( resin ) + -ol ¹

Word History and Origins

Origin of retinol¹

C19: from Greek rhētinē resin + -ol ¹

Example Sentences

If you’ve never used a retinol before, start by applying sparingly every second or third night for the first two weeks.

From 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.

From The Daily Beast

Retinol, ret′i-nol, n. a hydro-carbon oil used in printers' ink.

From Project Gutenberg