Anthraquinone

a yellow, water-insoluble, crystalline powder, C 14 H 8 O 2 , usually derived from or phthalic anhydride: used chiefly in the manufacture of anthraquinone dyes.
Historical Examples

Various synthetic processes have been used for the preparation of anthraquinone.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 Various

anthraquinone crystallizes in yellow needles or prisms, which melt at 277 C.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 Various

One of them was prepared from anthraquinone selenocyanide, by the action of ammonia under pressure.
Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives Y-Gwan Chen

The anthraquinone thus produced is washed and dissolved at a moderate heat in sulphuric acid.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley

The quinone with which we are at present concerned is anthraquinone.
Coal Raphael Meldola

So far only the diselenides of anthraquinone and their phenols are recognized remedies.
Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives Y-Gwan Chen

noun
a yellow crystalline solid used in the manufacture of dyes, esp anthraquinone dyes, which have excellent colour properties. Formula: C6H4(CO)2C6H4
anthraquinone
(ān’thrə-kwĭ-nōn’, -kwĭn’ōn’)
A yellow crystalline powder that is insoluble in water and used chiefly in the manufacture of dyes. Chemical formula: C14H8O2.