riboflavin

noun ri·bo·fla·vin \ ˌrī-bə-ˈflā-vən , ˈrī-bə-ˌflā- \

Updated on: 13 May 2018

Definition of riboflavin

: 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

See riboflavin defined for English-language learners

See riboflavin defined for kids

Recent Examples of riboflavin from the Web

And this nutrient-dense veggie is also loaded with riboflavin, (vitamin B2), which studies have found could reduce a woman's risk of developing PMS by 35%. 4.

— amy capetta, Woman's Day, "10 Foods That Fight Off ALL Your PMS Symptoms," 19 June 2015
Maple’s advocates also tout it as a source of minerals such as manganese and riboflavin.

— jason wilson, sacbee, "Vermont industry turns over a new leaf | The Sacramento Bee," 24 Apr. 2018
Truth be told, mushrooms supply several key nutrients — the B vitamins niacin, riboflavin, folate and B6, as well as iron, potassium and selenium.

— darlene zimmerman, Detroit Free Press, "Mushrooms supply B vitamins along with a nice dose of D," 31 Mar. 2018
His Washington-area surgeon, Dr. Rajesh Rajpal, treated his eye with riboflavin (or vitamin B2) drops for 30 minutes and then blasted it with ultraviolet light for another 30.

— childs walker, baltimoresun.com, "Ravens defensive tackle Brandon Williams seeing more clearly after surgery to combat eye condition," 14 Mar. 2018
The leaves and tubers are nutritious, providing protein, niacin, calcium, iron, vitamins A, C, B6 and thiamin, riboflavin, folate, magnesium, phosphorus and manganese.

— margaret lauterbach, idahostatesman, "Tips for growing sweet potatoes in Idaho | Idaho Statesman," 7 Mar. 2018
The pawpaw is a great source of vitamin C, potassium, calcium, riboflavin, niacin and manganese.

— jasper j. mirabile jr., kansascity, "Pawpaws are a fruit native to Missouri that the Founding Fathers enjoyed," 19 Oct. 2017
Read more: Often thought of as a nutrition lightweight, mushrooms supply some key nutrients, including niacin and riboflavin.

— darlene zimmerman, Detroit Free Press, "Mushroom, Onion and Parmesan Tartlets," 15 July 2017
While the amount of fat in your milk may vary, know that all cow’s milk contains the same nine essential nutrients: Calcium, protein, vitamin D, phosphorus, vitamin A, riboflavin, vitamin B-12, magnesium, potassium, and niacin.

— kathy r. byrnes, Cincinnati.com, "1%, whole, fat free – What’s the milk difference?," 3 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'riboflavin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of riboflavin

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

NEW! Time Traveler

First Known Use: 1935

in the meaning defined above

See Words from the same year

RIBOFLAVIN Defined for English Language Learners

riboflavin

noun

Definition of riboflavin for English Language Learners

: a natural substance (called a vitamin) that is found in certain foods (such as milk, eggs, and leafy vegetables) and that helps your body to be healthy

Medical Dictionary

riboflavin

noun ri·bo·fla·vin \ ˌrī-bə-ˈflā-vən, ˈrī-bə-ˌ \

variants: also riboflavine play \-ˌvēn\

medical Definition of riboflavin

: 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

Learn More about riboflavin

See words that rhyme with riboflavin Britannica.com: Encyclopedia article about riboflavin

Seen and Heard

What made you want to look up riboflavin? Please tell us where you read or heard it (including the quote, if possible).

show

riboflavin

Definition of riboflavin

Recent Examples of riboflavin from the Web

Origin and Etymology of riboflavin

RIBOFLAVIN Defined for English Language Learners

riboflavin

Definition of riboflavin for English Language Learners

Medical Dictionary

riboflavin

medical Definition of riboflavin

Learn More about riboflavin

Seen and Heard

WORD OF THE DAY

riposte

BROWSE DICTIONARY

Test Your Vocabulary

Words at Play

Noun + Verb Insult Generator

'Judicial' v. 'Judicious': We'll Settle The Case

'Deprived' vs. 'Depraved'

'Folksonomy': Let’s Get Organized

Ask the Editors

Ghost Word

2017 Word of the Year: Behind the Scenes

Literally

Is Singular 'They' a Better Choice?

Word Games

May 2018 Words of the Day Quiz

Words Used by Nabokov Quiz

How Strong Is Your Vocabulary?

Add Diction

8 Insults Made Up of a Noun and a Verb

'Judicial' v. 'Judicious': We'll Settle The Case

May 2018 Words of the Day Quiz

Trending: Melania Trump Undergoes 'Embolization'

Ghost Word

riboflavin

Definition of riboflavin

Recent Examples of riboflavin from the Web

Origin and Etymology of riboflavin

RIBOFLAVIN Defined for English Language Learners

riboflavin

Definition of riboflavin for English Language Learners

Medical Dictionary

riboflavin

medical Definition of riboflavin

Learn More about riboflavin

Seen and Heard

Love words? Need even more definitions?

Love words? Need even more definitions?

Words at Play

Ask the Editors

Word Games

8 Insults Made Up of a Noun and a Verb

'Judicial' v. 'Judicious': We'll Settle The Case

May 2018 Words of the Day Quiz

Trending: Melania Trump Undergoes 'Embolization'

Ghost Word