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Related to quartan: tertian, quartan malaria, quartan fever
Occurring every fourth day, counting inclusively, or every 72 hours. Used of a fever.
A malarial fever recurring every 72 hours.
[Middle English quartaine, from Old French, from Latin quārtāna, from quārtānus, of the fourth, from quārtus, fourth; see kwetwer- in the Appendix of Indo-European roots.]
(Pathology) (esp of a malarial fever) occurring every third day
[C13: from Latin febris quartāna fever occurring every fourth day, reckoned inclusively]
1. recurring every fourth day, both days of consecutive occurrence being counted: quartan fevers.n.
2. a quartan fever, ague, etc.
a. cuartana, que recurre cada cuatro días tal como la fiebre palúdica.