polyazo
adjective
poly·azo ¦pä-lē-¦ā-(ˌ)zō 
-¦a-
of a dye
: containing multiple azo groups in the molecule
… the aqueous ink has a polyazo dye containing at least two azo groups … 
US Federal News, 4 Oct. 2006
US Federal News, 4 Oct. 2006
Word History
First Known Use
1893, in the meaning defined above