azo dye

noun

, Chemistry.

1. any of a large class of dyes containing one or more azo groups.

azo dye

noun

1. any of a class of artificial dyes that contain the azo group. They are usually red, brown, or yellow and are obtained from aromatic amines

Word History and Origins

Origin of azo dye¹

First recorded in 1880–85

Example Sentences

In an organic binder like animal glue, and used with azo dyes, TiO2 turns into a photoreactive destroyer of all things colorful.

From The Daily Beast