Quadrantal (?), 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]
Quadrantal, 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]