biduotertian fever /bī′do̅o̅·ətur″shən/ [L, bis + dies, day, tertius, three] , a form of malaria characterized by overlapping paroxysms of chills, fever, and other symptoms. It is caused by infection with two strains of Plasmodium, each having its own cycle of symptoms, such as in quartan and tertian malaria. Compare double quartan fever. See also malaria.
