tertian

views updated May 14 2018

tertian (of a fever) of which the paroxysms occur every third (i.e. alternate) day; also sb. XIV. — L. tertiānus f. tertius THIRD; see -IAN.
So tertiary pert. to (a member of) the third series, order, etc. XVI. — L. tertiārius. tertium quid (old chem.) third substance distinct from its two components. XVIII. — late L., n. of tertius + quid, n. of quis somebody.

tertian

views updated Jun 11 2018

tertian (ter-shăn) adj. occurring every two days, as in the case of some intermittent fevers.