Quintan
(a.) Occurring as the fifth, after four others also, occurring every fifth day, reckoning inclusively; as, a quintan fever.
(n.) An intermittent fever which returns every fifth day, reckoning inclusively, or in which the intermission lasts three days.
Similar Words:
Asquint Biquintile Coloquintida Quint Quintain Quintal Quintan Quintel Quintessence Quintessential