Definitions for azo-
Random House Webster's College Dictionary
az•oˈæz oʊ, ˈeɪ zoʊ(adj.)
pertaining to or containing the bivalent group −N=N− united to two aromatic groups.
Origin of azo:
1875–80; <azo -
a combining form used in the names of chemical compounds containing nitrogen or the azo group.
Category: Chemistry, Affix
Origin of azo-:
comb. form repr. azote
Having a bivalent azo group (-N=N-) as a substituent
a combining form of azote
applied loosely to compounds having nitrogen variously combined, as in cyanides, nitrates, etc
now especially applied to compounds containing a two atom nitrogen group uniting two hydrocarbon radicals, as in azobenzene, azobenzoic, etc. These compounds furnish many artificial dyes. See Diazo-