Definitions

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

  • noun Any of three isomeric divalent organic groups, C6H4, derived from benzene by removal of two hydrogen atoms.

from The Century Dictionary.

  • noun A bivalent organic radical derived from benzene by the removal of two hydrogen atoms. Its formula is C6H4=.

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

  • noun (Chem.) A hypothetic radical (C6H4) occurring in certain derivatives of benzene.

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

  • noun chemistry Any of three isomeric divalent aromatic radicals derived from benzene by removing two hydrogen atoms from the ortho-, meta- or para- positions.

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