- Geometry. a solid figure all plane sections of which are ellipses or circles. Typical equation: (x2/a2) + (y2/b2) + (z2/c2) = 1.
Origin of ellipsoid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ellipsoid
The fruit is a small, ellipsoid drupe, which is bluish-black when ripe.Fruits of the Hawaiian Islands
Gerrit Parmile Wilder
Of the two eggs, one is of an ovoid form, having much the shape of a hen's egg; and the other is an ellipsoid.
Its form is that of an ellipsoid, with a major axis 26 millimetres in length, while the minor axis measures 11 millimetres.More Hunting Wasps
J. Henri Fabre
The form of the latter is at first globular, then ellipsoid, and more or less curved.Fungi: Their Nature and Uses
Mordecai Cubitt Cooke
Sporangia globose or ovoid to ellipsoid or oblong, erect or sometimes inclined or even nodding.The Myxomycetes of the Miami Valley, Ohio
A. P. Morgan
- a geometric surface, symmetrical about the three coordinate axes, whose plane sections are ellipses or circles. Standard equation: x ²/ a ² + y ²/ b ² + z ²/ c ² = 1, where ± a, ± b, ± c are the intercepts on the x-, y-, and z- axes
- a solid having this shapethe earth is an ellipsoid
Word Origin and History for ellipsoid
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.
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