'staminodial' originates from modern botanical formation, built from 'staminode' + suffix '-al', where 'staminode' itself derives from 'stamen' (Latin 'stamen' meaning 'thread') combined with Greek-derived suffix '-oid' meaning 'resembling'.

'staminodial' developed from New Latin/modern coinages such as 'staminode' (from Latin 'stamen' + Greek '-oid'), then formed into the English adjectival suffix '-al' to create 'staminodial'.

Initially it specifically meant 'pertaining to a staminode'; over time it has been used generally in botanical descriptions to mean 'relating to or resembling a staminode'.