biotin(redirected from coenzyme R)
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A vitamin, C10H16N2O3S, that is a component of the vitamin B complex and is a cofactor in many enzyme systems. It is found in large quantities in liver, egg yolk, milk, and yeast and is used in many biotechnology applications.
[Greek biōtos, life; see biotic + -in.]
(Biochemistry) a vitamin of the B complex, abundant in egg yolk and liver, deficiency of which causes dermatitis and loss of hair. Formula: C10H16N2O3S. See also avidin
[C20: biot- from Greek biotē life, way of life + -in]
bi•o•tin(ˈbaɪ ə tɪn)
a crystalline, water-soluble vitamin, C10H16O3N2S, of the vitamin B complex, present in all living cells. Also called vitamin H.
[1935–40; < German < Greek biot(ḗ) life + -in -in 1]
A vitamin belonging to the vitamin B complex that is important in the metabolism of carbohydrates and fats. It is found in liver, egg yolks, milk, yeast, and some vegetables.