- (a.) Of or pertaining to the fourth; occurring every fourth day, reckoning inclusively; as, a quartan ague or fever.
- (n.) An intermittent fever which returns every fourth day, reckoning inclusively, that is, one in which the interval between paroxysms is two days.
- (n.) A measure, the fourth part of some other measure.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). quartan. Retrieved September 20, 2026, from http://smartdefine.org/quartan/definitions/2051709 |
| Chicago | Webster's. 2011. "quartan" http://smartdefine.org/quartan/definitions/2051709 (accessed September 20, 2026). |
| Harvard | Webster's 2011, quartan, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/quartan/definitions/2051709>. |
| MLA | Webster's. "quartan" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/quartan/definitions/2051709> |