humectant

noun

hu·​mec·​tant hyü-ˈmek-tənt 

: a substance that promotes retention of moisture

humectant adjective

Examples of humectant in a Sentence

Recent Examples on the Web

On the moisturizing side, look for humectants like glycerin, hyaluronic acid, and urea, as well as barrier-supporting ingredients such as ceramides and cholesterol. — Christa Joanna Lee, Allure, 19 Sep. 2026

Alongside those exfoliators are ingredients like a special prebiotic that’s been clinically shown to boost hydration and reduce sebum, as well as botanical extracts and humectants to soothe and rehydrate. — Brigitt Earley, Glamour, 14 Sep. 2026

The fragrance-free formula contains hyaluronic acid and niacinamide, which are the best lightweight, skin-brightening humectants for hydrating parched skin. — Irene Richardson, InStyle, 28 Aug. 2026

Centella asiatica and tocopherol work together for hydration, which lactic acid acts as a humectant to lock in moisture and retain a lustrous look. — Conçetta Ciarlo, Vogue, 18 Aug. 2026

Word History

Etymology

Latin humectant-, humectans, present participle of humectare to moisten, from humectus moist, from humēre to be moist — more at humor entry 1

First Known Use

circa 1867, in the meaning defined above

Rhymes for humectant

• expectant
• protectant
• disinfectant

Medical Definition

humectant

1 of 2 adjective

hu·​mec·​tant hyü-ˈmek-tənt 

: promoting the retention of moisture

humectant properties

humectant materials

humectant

2 of 2 noun

: a substance (as glycerol or sorbitol) that promotes retention of moisture