Tertian in a sentence as an adjective

Also, China and Korea are lucky in that the prevailing form of malaria is Plasmodium vivax -- which actually used to be called "benign tertian malaria.

Tertian definitions

adjective

relating to symptoms (especially malarial fever) that appear every other day; "tertian fever"

adjective

of or relating to a tonal system based on major thirds; "a tertian tonal system"