'basidial' originates from New Latin, specifically the word 'basidium', where Greek 'basis' meant 'base' and the suffix '-ium' was used to form a noun.

'basidial' changed from New Latin 'basidialis' and eventually became the modern English word 'basidial'.

Initially, it meant 'pertaining to a basidium', and this specialized meaning has largely been retained in modern usage as 'relating to basidia or produced by basidia'.