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[dahy-uh-zoh-nee-uh m]
adjective Chemistry.
  1. of or derived from a diazonium compound.
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Origin of diazonium

1890–95; diaz- + -onium, as in ammonium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for diazonium

Historical Examples

  • These iso-diazotates are formed much more readily when the aromatic nucleus in the diazonium salt contains negative radicals.

    Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4


  • Nitrous acid converts them, in acid solution, into diazonium salts.

British Dictionary definitions for diazonium


  1. (modifier) of, consisting of, or containing the group, Ar-N:N-, where Ar is an aryl groupdiazonium group or radical; a diazonium compound
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Word Origin

C19: diazo + (amm) onium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012