Main Entry: ri·bo·fla·vin

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

Variant(s): also ri·bo·fla·vine \-ˌvēn\

Function: noun

: a yellow crystalline compound C₁₇H₂₀N₄O₆ that is a growth-promoting member of the vitamin B complex and occurs both free (as in milk) and combined (as in liver)—called also lactoflavin, ovoflavin, vitamin B₂