One of the B-complex vitamins

• Vitamin H
• A B vitamin
• B-complex vitamin
• A B vitamin that aids in body growth
• Vitamin in yeast and liver

Wikipedia Word definitions in Wikipedia
Biotin is a water-soluble B-vitamin ( vitamin B ), formerly known as vitamin H or coenzyme R . It is composed of a ureido (tetrahydroimidizalone) ring fused with a tetrahydrothiophene ring. A valeric acid substituent is attached to one of the carbon atoms ...

Wiktionary Word definitions in Wiktionary
n. (context vitamin English) A sulfur-containing member of the vitamin B complex found in liver, egg yolk, milk and yeast, essential to the activity of multiple enzyme systems.

WordNet Word definitions in WordNet
n. a B vitamin that aids in body growth [syn: vitamin H ]

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
vitamin of the B group (also sometimes called vitamin H ) essential for the growth of yeast, 1936, from German Biotin (1936), from Greek biotos "life" (see bio- ) + chemical suffix -in (2).