• WordNet 3.6
    • n benzoquinone any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes
    • ***
Century Dictionary and Cyclopedia
    • n benzoquinone Same as quinone.
    • ***
Chambers's Twentieth Century Dictionary
    • n Benzoquinone a golden-yellow crystalline compound usually prepared by oxidising aniline with potassium bichromate and sulphuric acid: a general name applied to all benzene derivatives in which two oxygen atoms replace two hydrogen atoms
    • ***


In literature:

Thus there is quinone itself, or benzoquinone, which is benzene with two atoms of oxygen replacing two atoms of hydrogen.
"Coal" by Raphael Meldola