vitamin B

noun

1

: vitamin b complex

2

or vitamin B₁

-ˈbē-ˈwən 

: thiamine

Examples of vitamin B in a Sentence

Recent Examples on the Web

This cream incorporates hyaluronic acid to lock in hydration and a compound called DMAE, a vitamin B derivative that can help to smooth skin’s texture. —Korin Miller, Flow Space, 28 Mar. 2025

Everybody seems to be taking either vitamins, like vitamin B capsules, or supplements that combine a few different vitamins or minerals. —Dylan Scott, Vox, 7 Mar. 2025

Microbes from the sourdough starters considered to have desirable characteristics, such as the ability to break down proteins and fiber, or produce short-chain fatty acids and vitamin B, will be incorporated into such foods at a later stage. —Michael Allen, JSTOR Daily, 20 Mar. 2025

Instead, consider facial cleansers that contain gentle yet efficacious ingredients like: hyaluronic acid, vitamin B, vitamin C, ceramides, and lactic acid. —Bianca Salonga, Forbes, 18 Feb. 2025

Word History

First Known Use

circa 1920, in the meaning defined at sense 1

Rhymes for vitamin B

• abc
• absentee
• addressee
• adoptee
• agouti
• allottee
• amphorae
• amputee
• apc
• apogee
• appointee
• assessee

Kids Definition

vitamin B

noun

1

: vitamin b complex

2

: thiamine

Medical Definition

vitamin B

noun

1

: vitamin b complex

2

: any of numerous members of the vitamin B complex

especially : thiamine