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riboflavin

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ri⋅bo⋅fla⋅vin

[rahy-boh-fley-vin, rahy-boh-fley-, -buh-]
–noun Biochemistry.
a vitamin B complex factor appearing as an orange-yellow, crystalline compound, C1 7H2 0N4O6, derived from ribose, essential for growth, found in milk, fresh meat, eggs, leafy vegetables, etc., or made synthetically, and used in enriching flour, in vitamin preparations, and in treating facial lesions.
Also, ri⋅bo⋅fla⋅vine [rahy-boh-fley-vin, -veen] .


Origin:
1930–35; ribo(se) + flavin
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ri·bo·fla·vin   (rī'bō-flā'vĭn, -bə-)   
n.  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. Also called lactoflavin, vitamin B2.

[ribo(se) + flavin.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

riboflavin 
1935, from Ger. Riboflavin (1935), from ribose (q.v.) + flavin, from L. flavus "yellow" (see blue), so called from its color.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: ri·bo·fla·vin
Pronunciation: "rI-b&-'flA-v&n, 'rI-b&-"
Variant: also ri·bo·fla·vine /-"vEn/
Function: noun
: a yellow crystalline compound C17H20N4O6 that is a growth-promoting member of the vitamin Bcomplex and occurs both free (as in milk) and combined (as in liver) called also lactoflavin, ovoflavin, vitamin B2
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

riboflavin ri·bo·fla·vin (rī'bō-flā'vĭn, -bə-)
n.
An orange-yellow crystalline compound that is the principal growth-promoting factor in the vitamin B complex, naturally occurring in milk, leafy vegetables, fresh meat, and egg yolks. Also called lactoflavin, vitamin B2.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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