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Meaning of benzene series

ben'zene se"ries

Pronunciation: [key]
— Chem. Chem.
  1. a series of aromatic hydrocarbons derived from benzene by replacing one or more of the hydrogen atoms with one or more methyl groups. The first three members are benzene, toluene, and xylene.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.