Quotidian
Quotidian (kwo*tid"i*an) , adjective
[Old English cotidian, Latin quotidianus, from quotidie daily; quotus how many + dies day: compare Old French cotidien, French quotidien. See Quota, Deity.]
Occurring or returning daily; as, a quotidian fever.
Quotidian (kwo*tid"i*an) , noun
(Medicine) Anything returning daily; especially (Medicine), an intermittent fever or ague which returns every day. — Milton