retinoid

noun

ret·​i·​noid ˈre-tə-ˌnȯid 

: any of various synthetic or naturally occurring analogs of vitamin A

Examples of retinoid in a Sentence

Recent Examples on the Web

Because tretinoin tends to be the more irritating of the two ingredients, these reactions may be particularly noticeable as your skin adjusts to the retinoid. — Kelsey Stewart, Allure, 18 Aug. 2026

Moisturizing before bed matters because skin hydration naturally drops in the evening, and the right nighttime moisturizer can also soothe irritation from actives like retinoids. — Samantha Agate, Sacbee.com, 17 Aug. 2026

At night, a retinoid or retinol is one of the best ingredients for improving fine lines and stimulating collagen over time. — Carlos Wolf, Miami Herald, 6 Aug. 2026

First of all, consult with your doctor or dermatologist prior to any retinoid use, Carolino says. — Rachel Burchfield, Forbes.com, 29 July 2026

Word History

First Known Use

1976, in the meaning defined above

Medical Definition

retinoid

noun

ret·​i·​noid ˈret-ᵊn-ˌȯid 

: any of various synthetic or naturally occurring analogs of vitamin A

retinoid adjective