spherical
71Spherical ungula — Ungula Un gu*la, n.; pl. {Ungul[ae]}. [L., a claw, hoof, from unguis a nail, claw, hoof.] 1. A hoof, claw, or talon. [1913 Webster] 2. (Geom.) A section or part of a cylinder, cone, or other solid of revolution, cut off by a plane oblique to the… …
72Spherical wedge — Wedge Wedge (w[e^]j), n. [OE. wegge, AS. wecg; akin to D. wig, wigge, OHG. wecki, G. weck a (wedge shaped) loaf, Icel. veggr, Dan. v[ae]gge, Sw. vigg, and probably to Lith. vagis a peg. Cf. {Wigg}.] [1913 Webster] 1. A piece of metal, or other… …
73spherical aberration — noun Date: 1868 aberration that is caused by the spherical form of a lens or mirror and that gives different foci for central and marginal rays …
74spherical triangle — noun Date: 1585 a spherical polygon of three sides …
75spherical trigonometry — noun Date: circa 1728 trigonometry applied to spherical triangles and polygons …
76Spherical angle — A spherical angle is a particular dihedral angle; it is the angle between two intersecting arcs on a sphere, and is measured by the angle between the planes containing the arcs (which would naturally also contain the centre of the sphere) …
77spherical aberration — variation in focal length of a lens or mirror from center to edge, due to its spherical shape. [1865 70] * * * …
78spherical geometry — the branch of geometry that deals with figures on spherical surfaces. [1720 30] * * * …
79spherical polygon — Geom. a closed figure formed by arcs of great circles on a spherical surface. [1715 25] * * * …
80spherical trigonometry — the branch of trigonometry that deals with spherical triangles. [1720 30] * * * …