(esp of a malarial fever) occurring every third day
WordReference Random House Unabridged Dictionary of American English © 2026
quar•tan
(kwôr′tn),USA pronunciation adj.
n.
- Pathology(of a fever, ague, etc.) characterized by paroxysms that recur every fourth day, both days of consecutive occurrence being counted.
n.
- Pathologya quartan fever or ague.
- Pathologyquartan malaria.
- Latin (febris) quartāna quartan (fever), feminine of quartānus, equivalent. to quart(us) fourth + -ānus -an
- Old French
- Middle English quartaine 1250–1300
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'quartan' also found in these entries (note: many are not synonyms or translations):