かいてんだえんたい
回転楕円体
1. spheroid
2. SpheroidA spheroid, or ellipsoid of revolution is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters. If the ellipse is rotated about its major axis, the result is a prolate (elongated) spheroid, like an American football or rugby ball. If the ellipse is rotated about its minor axis, the result is an oblate (flattened) spheroid, like a lentil. If the generating ellipse is a circle, the result is a sphere.
Read “Spheroid” on English Wikipedia
Read “回転楕円体” on Japanese Wikipedia
Read “Spheroid” on DBpedia
Read “Spheroid” on English Wikipedia
Read “回転楕円体” on Japanese Wikipedia
Read “Spheroid” on DBpedia
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