ORIGIN: from azo- oxy- 
azoxy-
combining form 
Etymology: International Scientific Vocabulary, from az- + oxy- 
 : containing the bivalent group −N(O) . N− composed of two nitrogen atoms and one oxygen atom united usually on both sides to carbon 
< azoxynaphthalene C10H7N(O) . NC10H7 >
< azoxynaphthalene C10H7N(O) . NC10H7 >