'anisandrous' originates from New Latin/Modern scientific coinage, ultimately from Greek 'anisandros' (ἀνίσανδρος), where 'aniso-' (from 'anisos') meant 'unequal' and 'andros' (from 'anēr/andr-') meant 'man, male' (used for 'stamen' in botanical formation).

'anisandrous' was formed in New Latin/scientific terminology from Greek 'anisandros' and entered English via botanical Latin; the term developed within botanical descriptions to describe flowers with unequal stamens.

Initially built from elements meaning 'unequal' + 'male', it came to be used specifically in botanical contexts to mean 'having stamens of unequal length.'