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quartan

[kwawr-tn]
adjective
  1. (of a fever, ague, etc.) characterized by paroxysms that recur every fourth day, both days of consecutive occurrence being counted.
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noun
  1. a quartan fever or ague.
  2. quartan malaria.
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Origin of quartan

1250–1300; Middle English quartaine < Old French < Latin (febris) quartāna quartan (fever), feminine of quartānus, equivalent to quart(us) fourth + -ānus -an
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for quartan

quartan

adjective
  1. (esp of a malarial fever) occurring every third day
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Word Origin

C13: from Latin febris quartāna fever occurring every fourth day, reckoned inclusively
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

quartan in Medicine

quartan

(kwôrtn)
adj.
  1. Recurring every fourth day, counting inclusively, or every 72 hours. Used of a fever.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.