1. quartan - Noun
2. quartan - Adjective
Of or pertaining to the fourth; occurring every fourth day, reckoning inclusively; as, a quartan ague, or fever.
An intermittent fever which returns every fourth day, reckoning inclusively, that is, one in which the interval between paroxysms is two days.
A measure, the fourth part of some other measure.
Source: Webster's dictionaryquartan malaria Source: Internet