'antral' originates from New Latin (Late Latin), specifically the word 'antralis', where 'antrum' meant 'cave' or 'cavity' (from Greek).

'antral' changed from Greek 'antron' → Latin 'antrum' and New Latin 'antralis', and eventually became the modern English word 'antral'.

Initially, it meant 'of or relating to a cave/cavity'; over time it evolved into the current anatomical sense 'relating to an antrum'.