a. 四分圆的, 象限的

[医] 四分体的, 象限的

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.


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.]