quartan
/ˈkwɔːtən/adjective
attrib.
1- Medicine denoting a mild form of malaria causing a fever that recurs every third day【医】（疟疾）每三日复发一次的：
quartan fever.
三日热病。
1.1
- Quartan malaria (or quartan ague) is caused by infection with Plasmodium malariae.三日疟是由三日疟原虫感染引起的。比较TERTIAN.
词源
late Middle English: from Latin （febris） quartana, based on Latin quartus 'fourth' （because， by inclusive reckoning， the fever recurs every fourth day）.