Main Entry: ri·bo·fla·vin

Pronunciation: \ˌrī-bə-ˈflā-vən, ˈrī-bə-ˌ\

Function: noun

Etymology: International Scientific Vocabulary ribo- + Latin flavus yellow — more at blue

Date: 1935

: a yellow crystalline compound C₁₇H₂₀N₄O₆ of the vitamin B complex that occurs both free (as in milk) and combined (as in liver) as a component of coenzymes (as FMN) which are essential to normal metabolism —called also vitamin B₂