quadrantal triangle — noun : a spherical triangle with one side equal to a quadrant … Useful english dictionary
Quadrantal — Quad*ran tal, a. [L. quadrantalis containing the fourth fourth part of a measure.] (Geom.) Of or pertaining to a quadrant; also, included in the fourth part of a circle; as, quadrantal space. [1913 Webster] {Quadrantal triangle}, a spherical… … The Collaborative International Dictionary of English
Quadrantal versor — Quadrantal Quad*ran tal, a. [L. quadrantalis containing the fourth fourth part of a measure.] (Geom.) Of or pertaining to a quadrant; also, included in the fourth part of a circle; as, quadrantal space. [1913 Webster] {Quadrantal triangle}, a… … The Collaborative International Dictionary of English
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] … The Collaborative International Dictionary of English