Quartan(a.) Of or pertaining to the fourth; occurring every fourth day, reckoning inclusively; as, a quartan ague, or fever.
Quartan(n.) An intermittent fever which returns every fourth day, reckoning inclusively, that is, one in which the interval between paroxysms is two days.
Quartan(n.) A measure, the fourth part of some other measure.
Quartane(n.) Butane, each molecule of which has four carbon atoms.

Words within quartan