(medicine) Recurring every twenty-four hours or (more generally) daily (of symptoms, etc). / Happening every day; daily.

(medicine, now rare, historical) A fever which recurs every day; quotidian malaria. / (Anglicanism, historical) A daily allowance formerly paid to certain members of the clergy.

plural of quotidian

The quality of being quotidian.

Occurring on a quotidian basis; daily or commonplace.