'aminoazo' originates from the combination of 'amino' and 'azo', where 'amino' refers to the presence of an amino group (NH2) and 'azo' refers to the presence of a nitrogen-nitrogen double bond (N=N).

'aminoazo' was derived from the combination of the terms 'amino' and 'azo', which have been used in chemistry to describe specific functional groups.

Initially, it referred to any compound containing both amino and azo groups, and this meaning has remained consistent in modern usage.