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Azo-

Definition: A combining form of azote

Azo-

Definition: Applied loosely to compounds having nitrogen variously
combined, as in cyanides, nitrates, etc.

Azo-

Definition: 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-.