'aminoazobenzene' originates from 'amino' and 'azobenzene', where 'amino' refers to the presence of an amino group and 'azobenzene' is a compound consisting of two phenyl rings linked by a N=N double bond.

'aminoazobenzene' changed from the combination of 'amino' and 'azobenzene' to form a compound used in dye manufacturing.

Initially, it meant a compound used in dye manufacturing, and this meaning has largely remained the same in modern usage.