'staminodal' originates from Neo-Latin/modern botanical formation, specifically from the word 'staminode' plus the English adjectival suffix '-al', where 'stamin-' referred to 'stamen' (the male reproductive part of a flower) and '-al' meant 'pertaining to'.

'staminodal' developed from the Neo-Latin term 'staminode' (a sterile or modified stamen) combined with the English suffix '-al' to form an adjective used in botanical descriptions; this formation produced the modern English adjective 'staminodal'.

Initially the components referred to 'stamen' and the derived noun 'staminode' (a sterile stamen); over time the adjective 'staminodal' came to be used specifically to mean 'relating to or resembling a staminode' in botanical contexts.