DICT.TW Dictionary Taiwan

 quar·tan /ˈkwɔrtṇ/
 (a.)每四天的四日熱

 quar·tan /ˈkwɔrtṇ/ 形容詞
 每第四日(復發)的,三日瘧

 Quar·tan a.  Of or pertaining to the fourth; occurring every fourth day, reckoning inclusively; as, a quartan ague, or fever.

 Quar·tan, n.
 1. Med. An intermittent fever which returns every fourth day, reckoning inclusively, that is, one in which the interval between paroxysms is two days.
 2. A measure, the fourth part of some other measure.
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 quartan
      adj : occurring every fourth day (especially the fever and
            weakness of malaria); "quartan malaria"