'homostylic' originates from New Latin/Latinized Greek, specifically from Greek 'homos' meaning 'same' and Greek 'stylos' meaning 'pillar' or 'style'.

'homostylic' changed from New Latin 'homostylus' (from Latinized Greek 'homostylos') and eventually became the modern English adjective 'homostylic'.

Initially, it meant 'having the same style (length)', and this botanical meaning has largely remained the same in modern usage.