QUADRANTAL Quad*ran"tal, a. Etym: [L. quadrantalis containing the fourth fourth part of a measure.] (Geom.)
Defn: 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 90º. — Quadrantal versor, a versor that expresses rotation through one right angle.
QUADRANTAL
Quad*ran"tal, n. Etym: [L.]
1. (Rom. Antiq.)
Defn: A cubical vessel containing a Roman cubic foot, each side being a Roman square foot; — used as a measure.
2. A cube. [R.]
QUADRAT
Quad"rat, n. Etym: [F. quadrat, cadrat. See Quadrate.]
1. (Print.)
Defn: A block of type metal lower than the letters, — used in spacing and in blank lines. [Abbrev. quad.]
2. An old instrument used for taking altitudes; — called also geometrical square, and line of shadows.