riboflavin

noun

ri·​bo·​fla·​vin ˌrī-bə-ˈflā-vən How to pronounce riboflavin (audio)
ˈrī-bə-ˌflā-
: 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 (such as FMN) which are essential to normal metabolism

called also vitamin B2

Examples of riboflavin in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Plus, nutritional yeast is a vegan source of vitamin B12 and other B vitamins such as vitamin B6, riboflavin, niacin, and folate.28 19. Jamie Johnson, Verywell Health, 6 Feb. 2025 There are a series of vitamins found in eggs, including vitamins A, B12, D, E, biotin, riboflavin and thiamine. Olivia Munson, USA TODAY, 30 Jan. 2025 These include calcium, vitamins D (when fortified) and B12, niacin, phosphorus, riboflavin, pantothenic acid. Maxine Lipner, Verywell Health, 10 Jan. 2025 Maple syrup has a higher concentration of nutrients such as potassium, calcium, riboflavin, and zinc. Lauren O'Connor, Ms, Health, 6 Jan. 2025 See all Example Sentences for riboflavin 

Word History

Etymology

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

First Known Use

1935, in the meaning defined above

Time Traveler
The first known use of riboflavin was in 1935

Dictionary Entries Near riboflavin

Cite this Entry

“Riboflavin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/riboflavin. Accessed 12 Feb. 2025.

Kids Definition

riboflavin

noun
ri·​bo·​fla·​vin ˌrī-bə-ˈflā-vən How to pronounce riboflavin (audio)
: a vitamin of the vitamin B complex that helps growth and is found both free (as in milk) and combined with other substances (as in liver)

called also vitamin B2

Medical Definition

riboflavin

noun
ri·​bo·​fla·​vin ˌrī-bə-ˈflā-vən, ˈrī-bə-ˌ How to pronounce riboflavin (audio)
variants also riboflavine
: 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

More from Merriam-Webster on riboflavin

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