subtertian
/ˌsʌbˈtəːʃn/Medicine
adjective
Designating a form of malaria that has a periodicity which deviates somewhat from that of ordinary tertian malaria (usually by a shortening of the time between paroxysms), specifically that caused by Plasmodium falciparum; characteristic of or causing this form of malaria. Now chiefly historical.
noun
Subtertian malaria; specifically falciparum malaria. Now rare.
Origin
Mid 19th century. From sub- + tertian. Compare earlier semitertian and subintrant.