the bivalent group −N=N− united to two aromatic groups, as in azobenzene.
Why Are Singing Groups Called “Glee Clubs”?These infamously chipper singing groups are called glee because the melding of voices makes everyone happy, right? Actually, joy has little to do with it.
Origin of azo group
First recorded in 1890–95
Also called azo radical.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for azo group
The azo-group is particularly active, both the aliphatic and aromatic compounds being coloured.