/buy"euh tin/ , n. Biochem.
a crystalline, water-soluble vitamin, C 10 H 16 O 3 N 2 S, of the vitamin B complex, that is present in all living cells and functions as a growth factor and as a catalyst in carboxylation reactions. Also called vitamin H .
[ 1935-40; Biotin bioté life + -in -IN 2 ]