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

Almonds are also rich in vitamin B and magnesium, which play an important role in helping cells generate energy. — Cristina Mutchler, Verywell Health, 2 Nov. 2026

In one study, researchers observed that three months of supplementation with magnesium, melatonin, and vitamin B complex, taken about one hour before bed, may help treat insomnia. — Emmanuella Ogbonna, HEALTH, 2 Oct. 2026

In addition, alcohol interferes with the break down and absorption of key nutrients thought to decrease cancer risk — vitamins A, C, D and E as well as folates in the vitamin B complex, according to NCI. — Sandee Lamotte, CNN Money, 3 Sep. 2026

These stains provide larvae with nutrients, such as vitamin B and salt. — Nafeesah Allen, Better Homes & Gardens, 10 July 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