Meaning of DIAZO in English

n. (in full diazotype) a copying or colouring process using a diazo compound decomposed by light. diazo compound Chem. a chemical compound containing two usu. multiply-bonded nitrogen atoms, often highly coloured and used as dyes.

[ DI-(1) + AZO- ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.