\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.

\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.]