/ Dictionary / Index T tertian: Meaning and Definition of Find definitions for: ter•tian Pronunciation: (tûr'shun), [key] — adj. (of a malarial fever, etc.) characterized by paroxysms that recur every other day. —n. a tertian fever. a Jesuit during the period of tertianship. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tertian (Thesaurus) tertial tertianship Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language