[ az-oh, ey-zoh ]
/ ˈæz oʊ, ˈeɪ zoʊ /

adjective Chemistry.

containing the azo group.

Origin of azo

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

Definition for azo (2 of 2)


a combining form used in the formation of compound words, especially names of chemical compounds containing nitrogen or the azo group: azobenzene.
Also especially before a vowel, az-.

Origin of azo-

< Greek ázō(os) without life, equivalent to a- a-6 + zō- zo- Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for azo

British Dictionary definitions for azo (1 of 2)

/ (ˈeɪzəʊ, ˈæ-) /


of, consisting of, or containing the divalent group -N:N-an azo group or radical See also diazo

Word Origin for azo

independent use of azo-

British Dictionary definitions for azo (2 of 2)


before a vowel az-

combining form

indicating the presence of an azo groupazobenzene

Word Origin for azo-

from French azote nitrogen, from Greek azōos lifeless, from a- 1 + zōē life
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for azo



Containing a nitrogen group, especially one attached at both ends in a covalent bond to other groups:azole.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for azo (1 of 2)

[ ăzō, āzō ]

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

Science definitions for azo (2 of 2)


A prefix that means “containing an azo group attached at both ends to other groups,” as in the compound azobenzene.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.