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Meaning of diazo group

diaz'o group"

Pronunciation: [key]
— Chem. Chem.
  1. the bivalent group –N=N– united with one hydrocarbon group and another atom or group, as in benzenediazo hydroxide, CHN=NOH, or the bivalent group =N=N united with one hydrocarbon group, as in diazomethane, CH=N=N. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.