azo

¹ American  

[az-oh, ey-zoh] / ˈæz oʊ, ˈeɪ zoʊ /

adjective

Chemistry.

1. containing the azo group.

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azo- ² American  

1. a combining form used in the formation of compound words, especially names of chemical compounds containing nitrogen or the azo group.

   azobenzene.

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azo- ¹ British  

combining form

1. indicating the presence of an azo group

   azobenzene

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azo ² British  

/ ˈæ-, ˈeɪzəʊ /

adjective

1. of, consisting of, or containing the divalent group -N:N- See also diazo

   an azo group or radical

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azo ¹ Scientific  

/ ăz′ō,ā′zō /

1. Containing two nitrogen atoms joined by a double bond, with each nitrogen atom attached to another group.

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azo– ² Scientific  

1. A prefix that means “containing an azo group attached at both ends to other groups,” as in the compound azobenzene.

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Etymology

Origin of azo¹

First recorded in 1875–80; independent use of azo-

Origin of azo-²

< Greek ázō ( os ) without life, equivalent to a- a- ⁶ + zō- zo-

Example Sentences

But some of the chemicals involved, such as azo dyes, contain materials linked to cancer and other harmful effects.

From Scientific American • Nov. 13, 2020

“They’ll have to put the ball in the net and play better defense” versus “Golazo, azo, azo, azo!”

From Salon • Aug. 26, 2010

Violet.—Hessian purple, Congo Corinth, heliotrope, Congo violet, diamine violet, Hessian violet, azo violet, benzo violet, violet black, diamine Bordeaux, chlorantine lilac, diphenyl violet, triazol violet, Columbia violet.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" by Various

Methods have been devised for producing the insoluble azo colours direct upon the fibres.

From The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student by Beech, Franklin

In the preparation of the azo dyes the starting-point is a primary amine; the amino group is 'diazotized', i.e. treated with a solution of sodium nitrite and dilute mineral acid at low temperature.

From The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde by Various