el·lip·soid ( -lp soid )n. A geometric surface, all of whose plane sections are either ellipses or circles. el·lip soid, el·lipsoidal (-lpsoidl,  lp-,  lp-) adj. |   x2/a2 + y2/b2 + z2/c2 =1 |
ellipsoid [ɪˈlɪpsɔɪd]
n
(Mathematics)
a. a geometric surface, symmetrical about the three coordinate axes, whose plane sections are ellipses or circles. Standard equation: x2/a2 + y2/b2 + z2/c2 = 1, where ±a, ±b, ±c are the intercepts on the x-, y-, and z- axes
b. a solid having this shape the earth is an ellipsoid
ellipsoidal [ɪlɪpˈsɔɪdəl ˌɛl-] adj
| ellipsoid (-lpsoid) A three-dimensional geometric figure resembling a flattened sphere. Any cross section of an ellipsoid is an ellipse or circle. An ellipsoid is generated by rotating an ellipse around one of its axes. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  ellipsoid - a surface whose plane sections are all ellipses or circles; "the Earth is an ellipsoid"plane figure, two-dimensional figure - a two-dimensional shape |
| Adj. | 1. | ellipsoid - having the nature or shape of an ellipsoid rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders" |
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