Tertian

[tә:ʃәn]

(adj.) of or relating to a tonal system based on major thirds; 'a tertian tonal system' .

(adj.) relating to symptoms (especially malarial fever) that appear every other day; 'tertian fever' .

Editor: Vicky--From WordNet

(a.) Occurring every third day; as, a tertian fever.

(n.) A disease, especially an intermittent fever, which returns every third day, reckoning inclusively, or in which the intermission lasts one day.

(n.) A liquid measure formerly used for wine, equal to seventy imperial, or eighty-four wine, gallons, being one third of a tun.

Typed by Ann

adj. occurring every third day.—n. an ague or fever with paroxysms every third day.

Typed by Garrett