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• diazo
  diazo

  adjective

  containing the diazo group.
• diazo-
  diazo-

  a combining form with the meaning “diazo group,” used in the formation of compound words.

diazo

¹ American  

[dahy-az-oh, -ey-zoh] / daɪˈæz oʊ, -ˈeɪ zoʊ /

adjective

Chemistry.

1. containing the diazo group.

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diazo- ² American  

Chemistry.

1. a combining form with the meaning “diazo group,” used in the formation of compound words.

   diazomethane.

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diazo British  

/ daɪˈeɪzəʊ /

adjective

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

   diazo compound

2. Also: dyeline.  of or relating to the reproduction of documents using the bleaching action of ultraviolet radiation on diazonium salts

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noun

1. a document produced by this method

Etymology

Origin of diazo¹

First recorded in 1855–60; independent use of diazo-

Origin of diazo-²

di- ¹ + azo-

Example Sentences

So I think the room where they kept the diazo machine became like my studio.

From New York Times • Feb. 27, 2020

Wherever light strikes, the diazo compounds are quickly and effectively bleached.

From Time Magazine Archive

Instead, a strip of cellophane is thoroughly impregnated with a mixture of "diazo" compounds which are closely related to dyes, but are only a faint yellow in color.

From Time Magazine Archive

In the azo group some colors are fugitive, others are moderately fast, and it is generally recognized that certain classes of the tetrazo compounds are distinctly faster than the ordinary diazo colors.

From Scientific American Supplement, No. 810, July 11, 1891 by Various

The presence of an excess of nitrite can be determined by testing the diazo solution with potassium iodide starch paper, which in the presence of excess of nitrite gives the blue iodine starch reaction.

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