Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An orange-yellow crystalline compound, C17H20N4O6, the principal growth-promoting factor in the vitamin B complex, naturally occurring in milk, leafy vegetables, fresh meat, and egg yolks.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry Yellow or orange-yellow water-soluble compound, a member of the vitamin B complex, that acts as a growth-promoting factor in humans and other animals.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a B vitamin that prevents skin lesions and weight loss

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[ribo(se) + flavin.]

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Examples

  • •Vitamin B2, also known as riboflavin, is important to help balance the effects of B1 and B3.

    SO STRESSED William Kent Krueger 2010

  • •Vitamin B2, also known as riboflavin, is important to help balance the effects of B1 and B3.

    SO STRESSED William Kent Krueger 2010

  • "Your urine will often turn a bright yellow or orange color due to the presence of vitamin B2, also known as riboflavin," says Tieraona Low Dog, M.D., clinical associate professor of medicine at the Arizona Center for Integrative Medicine at the University of Arizona.

    The Full Feed from HuffingtonPost.com The Huffington Post News Editors 2011

  • "Your urine will often turn a bright yellow or orange color due to the presence of vitamin B2, also known as riboflavin," says Tieraona Low Dog, M.D., clinical associate professor of medicine at the Arizona Center for Integrative Medicine at the University of Arizona.

    The Full Feed from HuffingtonPost.com The Huffington Post News Editors 2011

  • "Your urine will often turn a bright yellow or orange color due to the presence of vitamin B2, also known as riboflavin," says Tieraona Low Dog, M.D., clinical associate professor of medicine at the Arizona Center for Integrative Medicine at the University of Arizona.

    The Full Feed from HuffingtonPost.com The Huffington Post News Editors 2011

  • In one test, he put "riboflavin" on a list of nutrients.

    When Voters Lie 2008

  • It's probably because ultraviolet light, which can penetrate clear glass bottles and HDPE, degrades vitamins A and D and riboflavin.

    Milk jugs - glass, plastic and paperboard - have different environmental impacts 2011

  • "The beautiful yellow pigments" turned out to be riboflavin, although Kuhn called it both lactoflavin and ovoflavin because they had first abstracted it from milk and egg whites.

    Richard Kuhn and the Chemical Institute: Double Bonds and Biological Mechanisms 2010

  • In 1933, Kuhn began a new series of investigations on vitamins in the B family, during which his research group was the first to isolate and purify riboflavin, the essential vitamin B2.

    Richard Kuhn and the Chemical Institute: Double Bonds and Biological Mechanisms 2010

  • It's probably because ultraviolet light, which can penetrate clear glass bottles and HDPE, degrades vitamins A and D and riboflavin.

    Milk jugs - glass, plastic and paperboard - have different environmental impacts 2011

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