niacinamide

noun

ni·​a·​cin·​amide ˌnī-ə-ˈsi-nə-ˌmīd 

: a compound C₆H₆N₂O of the vitamin B complex found especially as a constituent of coenzymes and used similarly to niacin

called also nicotinamide

Examples of niacinamide in a Sentence

Recent Examples on the Web

Ingredients once discussed only by dermatologists and cosmetic chemists now dominate social media feeds, while hyaluronic acid, niacinamide, peptides and ceramides have become part of everyday conversation. — Kate Hardcastle, Forbes.com, 6 Aug. 2026

The gentle formula deeply hydrates thanks to its impressive lineup of ingredients like hyaluronic acid and niacinamide. — Kyra Surgent, InStyle, 2 Aug. 2026

The new formula, which is infused with niacinamide, more vitamins C and B5, and more hyaluronic acid, acts as a solid primer for makeup while offering up more hydrating, nourishing qualities. — Gina Vaynshteyn, StyleCaster, 31 July 2026

The lightweight formula is extremely hydrating, formulated with hyaluronic acid to help lock in moisture and niacinamide to improve the skin’s appearance. — Caroline Hughes, Travel + Leisure, 31 July 2026

Word History

First Known Use

1942, in the meaning defined above

Rhymes for niacinamide

• acetazolamide
• polyacrylamide
• acrylamide
• cyanamide
• procainamide
• sulfonamide
• sulphonamide
• amide
• nicotinamide
• sulfanilamide

Kids Definition

niacinamide

noun

ni·​a·​cin·​amide ˌnī-ə-ˈsin-ə-ˌmīd 

: a compound of the vitamin B complex that is used like niacin

Medical Definition

niacinamide

noun

ni·​a·​cin·​amide ˌnī-ə-ˈsin-ə-ˌmīd 

: a bitter crystalline basic amide C₆H₆N₂O that is a member of the vitamin B complex and is formed from and converted to niacin in the living organism, that occurs naturally usually as a constituent of coenzymes, and that is used similarly to niacin

called also nicotinamide