a combining form of azote.
2. azo- ·- applied loosely to compounds having nitrogen variously combined, as in cyanides, nitrates, ·etc.
3. azo- ·- 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-.