semiminor axis
noun Date: 1909 one half of the minor axis of an ellipse (as that formed by the orbit of a planet)

New Collegiate Dictionary. 2001.

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  • semiminor axis — [sem′imī′nər] n. Astron. one half of the shorter axis of an elliptical orbit …   English World dictionary

  • semiminor axis — noun one half the minor axis of an ellipse (Freq. 1) • Hypernyms: ↑axis • Part Holonyms: ↑minor axis …   Useful english dictionary

  • semiminor axis — /sem ee muy neuhr, sem uy , sem ee , sem uy / 1. Geom. one half the minor axis of an ellipse. 2. Astron. one half the minor axis of the ellipse that one celestial body describes around another, as a planet around the sun. [1925 30; SEMI + MINOR]… …   Universalium

  • semiminor axis — sem′i•mi′nor ax′is [[t]ˈsɛm iˈmaɪ nər, ˈsɛm aɪ , ˌsɛm i , ˌsɛm aɪ [/t]] n. 1) math. one half the minor axis of an ellipse 2) one half the minor axis of the ellipse that one celestial body describes around another • Etymology: 1925–30 …   From formal English to slang

  • semiminor — adjective Describing the axis of a parabola at right angles to the semimajor axis …   Wiktionary

  • Semi-minor axis — The semi minor axis of an ellipse In geometry, the semi minor axis (also semiminor axis) is a line segment associated with most conic sections (that is, with ellipses and hyperbolas). One end of the segment is the center of the conic section, and …   Wikipedia

  • minor axis — noun the shorter or shortest axis of an ellipse or ellipsoid • Hypernyms: ↑axis • Part Meronyms: ↑semiminor axis …   Useful english dictionary

  • geoid — geoidal, adj. /jee oyd/, n. 1. an imaginary surface that coincides with mean sea level in the ocean and its extension through the continents. 2. the geometric figure formed by this surface, an ellipsoid flattened at the poles. [1880 85; < Gk… …   Universalium

  • Degenerate conic — Main article: Conic section In mathematics, a degenerate conic is a conic (degree 2 plane curve, the zeros of a degree 2 polynomial equation, a quadratic) that fails to be an irreducible curve. This can happen in two ways: either it is a… …   Wikipedia

  • North American Datum — Triangulation station at Meade s Ranch Fundamental station for the North American Datum of 1927 Geodesy …   Wikipedia

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