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 triangle having one side equal to a quadrant or arc of 90°. --
Quadrantal versor, a versor that expresses rotation through one right angle. [ 1913 Webster ]

n. [ L. ] 1. (Rom. Antiq.) A cubical vessel containing a Roman cubic foot, each side being a Roman square foot; -- used as a measure. [ 1913 Webster ]

2. A cube. [ R. ] [ 1913 Webster ]

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 ]