Quadric :: Quadric (a.) Of or pertaining to the second degree.
Quadric :: Quadric (n.) A quantic of the second degree. See Quantic.
Quadric :: Quadric (n.) A surface whose equation in three variables is of the second degree. Spheres, spheroids, ellipsoids, paraboloids, hyperboloids, also cones and cylinders with circular bases, are quadrics..
Quadrijugous :: Quadrijugous (a.) Pinnate, with four pairs of leaflets; as, a quadrijugous leaf..
Quadrilateral :: Quadrilateral (a.) Having four sides, and consequently four angles; quadrangular..
Quadrilateral :: Quadrilateral (n.) A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines..
Quadrilateral :: Quadrilateral (n.) An area defended by four fortresses supporting each other; as, the Venetian quadrilateral, comprising Mantua, Peschiera, Verona, and Legnano..