'Triquadrantal' definitions:

Definition of 'Triquadrantal'

From: GCIDE
  • Triquadrantal \Tri`quad*ran"tal\, a. [Pref. tri- + quadrantal.] (Spherical Trig.) Having three quadrants; thus, a triquadrantal triangle is one whose three sides are quadrants, and whose three angles are consequently right angles. [1913 Webster]