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

It’s formulated with skincare powerhouses like hyaluronic acid and retinol, the former of which helps to nourish and firm the skin, while the latter works to reduce the appearance of fine lines and wrinkles. —Clara McMahon, People.com, 14 Feb. 2025

Serum Think of this as retinol’s gentler, faster-acting cousin. —Venus Wong, refinery29.com, 7 Feb. 2025

Most retinol products are all about exfoliation, but Alastin takes it a step further by pairing retinol with peptides and antioxidants to soothe, protect, and strengthen the skin. —Christa Joanna Lee, Allure, 4 Feb. 2025

Avoid certain ingredients: Avoid skin care products containing retinol (vitamin) or glycolic acid. —Mark Gurarie, Verywell Health, 23 Jan. 2025

Word History

Etymology

retin- + -ol entry 1; from its being the source of retinal

First Known Use

1960, in the meaning defined above

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 

: vitamin a sense a