Quo*tid"i*an (?) a. [OE. cotidian, L. quotidianus, fr. quotidie daily; quotus how many + dies day: cf. OF. cotidien, F. quotidien. See Quota, Deity.]
Occurring or returning daily; as, a quotidian fever.
© Webster 1913.
Quo*tid"i*an (?), n.
Anything returning daily; especially Med., an intermittent fever or ague which returns every day.
Milton.
© Webster 1913.