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

The supplement blend focuses on vitamin B and vitamin D, a nutrient Monaghan recognizes many people commonly lack. — Mara Santilli, Flow Space, 2 July 2026

The transparent, cooling, jelly-like formula features niacinamide, a form of vitamin B that smooths uneven texture and fades hyperpigmentation. — Sophie Wirt, InStyle, 1 July 2026

Both groups also took a vitamin B complex. — Michele Laufik, Martha Stewart, 26 June 2026

Both groups also took a vitamin B complex. — Sandee Lamotte, CNN Money, 18 June 2026

Word History

First Known Use

circa 1920, in the meaning defined at sense 1

Rhymes for vitamin B

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

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