Learn how to say Riboflavin correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word riboflavin:
[mass noun] Biochemistry
a yellow vitamin of the B complex which is essential for metabolic energy production. It is present in many foods, especially milk, liver, eggs, and green vegetables, and is also synthesized by the intestinal flora. Also called vitamin B2.
1930s: from ribose + Latin flavus ‘yellow’ + -in1