Definitions

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

  • noun Any of various water-soluble yellow pigments, including riboflavin, found in plant and animal tissue as coenzymes of flavoprotein.
  • noun A ketone, C10H6N4O2, that gives color to various natural yellow pigments.

from The Century Dictionary.

  • noun A yellow dyestuff prepared by the action of sulphuric acid on quercitron-bark.
  • noun A bright yellow crystalline compound, C13H12ON2. Also called 2,2′ -diaminobenzophenone. It melts at 135° C.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) A yellow, vegetable dyestuff, resembling quercitron.

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

  • noun biochemistry Any of a class of tricyclic heterocyclic compounds derived from riboflavin; found especially as the adenine dinucleotide (FAD)

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

  • noun a ketone that forms the nucleus of certain natural yellow pigments like riboflavin

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