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


Sorry, no etymologies found.



Log in or sign up to get involved in the conversation. It's quick and easy.