from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Occurring every fourth day, counting inclusively, or every 72 hours. Used of a fever.
- n. A malarial fever recurring every 72 hours.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A fever whose symptoms recur every four days.
- adj. Recurring every four days; especially in designating a form of malaria with such symptoms.
from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to the fourth; occurring every fourth day, reckoning inclusively.
- 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.
from The Century Dictionary and Cyclopedia
- Having to do with the fourth; especially, occurring every fourth day: as, a quartan ague or fever (one which recurs on the fourth day—that is, after three days).
- n. An intermitting ague that occurs every fourth day, both days of consecutive occurrence being counted, as on Sunday, Wednesday, Saturday, Tuesday, etc.
- n. A measure containing the fourth part of some other measure.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a malarial fever that recurs every fourth day
- adj. occurring every fourth day (especially the fever and weakness of malaria)
Middle English quartaine, from Old French, from Latin quārtāna, from quārtānus, of the fourth, from quārtus, fourth; see kwetwer- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
Anglo-Norman quartaine, Old French quartaine, from Latin quartāna (short for febris quartana), noun use of feminine form of quartānus ("recurring every four days"), from quartus ("fourth"). (Wiktionary)