Quadrantal \Quad*ran"tal\, n. [L.]

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

2. A cube. [R.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

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.

Quadrantal triangle, a spherical triangle having one side equal to a quadrant or arc of 90[deg].

Quadrantal versor, a versor that expresses rotation through one right angle.

Source: Webster's Revised Unabridged Dictionary (1913)