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. 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.]

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