'staminal' originates from Latin, specifically the word 'stamen', where 'stamen' originally meant 'warp, thread' (and later came to denote the botanical 'stamen'). The adjective-forming suffix '-al' (from Latin '-alis') was added to form 'staminal'.

'stamen' was used in Late Latin/Medieval Latin in botanical senses. The English noun 'stamen' was adopted from Latin, and the adjective 'staminal' developed by combining the Latin stem with the suffix '-al' to yield the modern English adjective 'staminal'.

Initially 'stamen' meant 'warp' or 'thread' in Latin; later botanical usage specialized it to the male reproductive organ of a flower, and 'staminal' evolved to mean 'pertaining to the stamen'.