ˌrībəˈflāvə̇n, ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun
also ri·bo·fla·vine “, -ˌvēn
Etymology: International Scientific Vocabulary rib- + flavin
: a yellow fluorescent crystalline flavin pigment C 17 H 20 N 4 O 6 derived from ribose that is a growth-promoting member of the vitamin B complex occurring both free (as in milk) and combined as nucleotides and flavoprotein enzymes (as in liver, green leafy vegetables, yeast, anaerobic fermentation bacteria), that is made synthetically or by fermentation, and that is used in nutrition (as in vitamin preparations, enriching flour and bread, and poultry feed) and in medicine (as in treating lesions of the tongue, lips, and face) — called also lactoflavin, vitamin B 2 , vitamin G; see ariboflavinosis 1