ellipsoid
(mathematics, geometry) A surface, all of whose cross sections are elliptic or circular (including the sphere), that generalises the ellipse and in Cartesian coordinates (x, y, z) is a quadric with equation x²/a² + y²/b² + z²/c² = 1.
(mineralogy) Lead telluride, an isometric yellowish-white mineral of the galena group.
(US, historical) A social movement led by Native American youth to demand self-determination for Native Americans in the United States.
plural of Mazzocco
二次曲面の性質を示すために、数学者は黒板に楕円体を描き、その断面がどのように楕円になるかを示した。
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