Definition of Anthraquinone

Babylon English Dictionary
(Chemistry) yellow crystal-like water-insoluble chemical used in the manufacture of dyes
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Anthraquinone Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(n.)
A hydrocarbon, C6H4.C2O2.C6H4, subliming in shining yellow needles. It is obtained by oxidation of anthracene.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
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anthraquinone
\an`thra*qui"none\ (&?;), n. [anthracene + quinone.] (chem.) a hydrocarbon, c6h4.c2o2.c6h4, subliming in shining yellow needles. it is obtained by oxidation of anthracene.

Anthraquinone Definition from Science & Technology Dictionaries & Glossaries
Mineralogy Database

General Information:
 Chemical Formula:
(C6H4)2(CO)2
 Composition:
(Molecular Weight = 208.22 gm)
Hydrogen 3.87 % H 
Carbon 80.76 % C 
Oxygen 15.37 % O 
 Empirical Formula:
C14H8O2
Physical Properties:
 Cleavage:
[???] Good
 Color:
yellow or yellow green.
 Density:
1.42
 Streak:
light yellow
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Anthraquinone Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
Anthraquinone, also called anthracenedione or dioxoanthracene is an aromatic organic compound with formula . Several isomers are possible, each of which can be viewed as a quinone derivative. The term anthraquinone, however, almost invariably refers to one specific isomer, 9,10-anthraquinone (IUPAC: 9,10-dioxoanthracene) wherein the keto groups are located on the central ring. It is a building block of many dyes and is used in bleaching pulp for papermaking. It is a yellow highly crystalline solid, poorly soluble in water but soluble in hot organic solvents. For instance, it is almost completely insoluble in ethanol near room temperature but 2.25 g will dissolve in 100 g of boiling ethanol.

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Anthraquinone Definition from Medicine Dictionaries & Glossaries
NCI Dictionary of Cancer Terms
A type of anticancer drug. 
A Service of the National Cancer Institute.