az•oPronunciation: (az'ō, ā'zō), [key]
containing the azo group.
a combining form used in the formation of compound words, esp. names of chemical compounds containing nitrogen or the azo group: azobenzene. Also, esp. before a vowel,az-.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.