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Longman Dictionary of Contemporary English
spheroid
noun
EXAMPLES FROM CORPUS
▪ In mechanical terms, the head is an elliptical spheroid with a single universal joint, the neck.
The Collaborative International Dictionary
Spheroid

Spheroid \Sphe"roid\, n. [L. spheroides ball-like, spherical, Gr. ???; ???? sphere + e'i^dos form: cf. F. sph['e]ro["i]de.] A body or figure approaching to a sphere, but not perfectly spherical; esp., a solid generated by the revolution of an ellipse about one of its axes.

Oblate spheroid, Prolate spheroid. See Oblate, Prolate, and Ellipsoid.

Douglas Harper's Etymology Dictionary
spheroid

"body resembling, but not identical with, a sphere," 1560s, from Latin sphaeroides, from Greek sphairoeides "ball-like, spherical," from sphaira (see sphere) + -oeides "form" (see -oid). As an adjective from 1767. Related: Spheroidal.

Wiktionary
spheroid

a. Of a shape similar to a squashed sphere. alt. A solid of revolution generated by rotating an ellipse about its major (prolate), or minor (oblate) axis. n. A solid of revolution generated by rotating an ellipse about its major (prolate), or minor (oblate) axis.

WordNet
spheroid

n. a shape that is generated by rotating an ellipse around one of its axes; "it looked like a sphere but on closer examination I saw it was really a spheroid" [syn: ellipsoid of revolution]

Usage examples of "spheroid".

That was a minor vessel, readily expendable, though formidable enough, a hundred-meter spheroid abristle with guns, missile launchers, energy projectors.

Breasts were the spheroids of an older woman, nipples larger, the waist not so narrow, thighs thicker, shoulders rounder, feet longer, and, yes, she also had dark blue tufts of hair in her armpits.

That, Manship realized, was how he had learned that the shifting patches of light on the spheroid were meter readings.

On the outside she remained a hundred-meter spheroid, its smoothness broken by airlocks, hatches, boat bays, instrument housings, communications boom, grapples, and micrometeoroid pocks that had given the metal a matte finish.

It is believed that the spout of the oil-can must have passed under the zygoma to the base of the skull, perforating the great wing of the spheroid bone and penetrating the centrum ovale, injuring the anterior fibers of the motor tract in the internal capsule near the genu.

Plasma sail -- I checked the ref, found screeds about the system, a vast electromagnetic field enclosing a spheroid of ionized gas that interacted with the solar photon flux like a lightsail.

Instead, the limbs were home to pale shelf fungi and yellow slime mold, white mushroomlike spheroids, and vaguely obscene crimson pipes.

Plasma sail -- I checked the ref, found screeds about the system, a vast electromagnetic field enclosing a spheroid of ionized gas that interacted with the solar photon flux like a lightsail.

Beyond that I made out bundles of spheroids and tetrahedra, pencils of rods and wands - my gaze roved over a speckling of shape and colour.

Glancing timorously around to see that nobody was watching he put out a hand, wrenched one of the spheroids from its stem.

The egg — a flexible ciliolate spheroid half an inch in diameter — is "willed" into being by the vampire host and passed on mouth to mouth, or by sexual intercourse, or by simple spillage when it must find its own way.

Formless protoplasm able to mock and reflect all forms and organs and processes - viscous agglutinations of bubbling cells - rubbery fifteen-foot spheroids infinitely plastic and ductile - slaves of suggestion, builders of cities - more and more sullen, more and more intelligent, more and more amphibious, more and more imitative!

He thus obtained a spheroid, the capacity of which amounted, in round numbers, to ninety thousand cubic feet.

A decision was reached that ensured the Pace-Trevayne cornpany's emergence as the Space Administration's largest independent contractor of spheroid discs capable of sustaining rocket thrusts of ultimately six hundred thousand pounds.

In the earlier dreams, I contented myself with exploring these incredible cities, attempting to measure their angles -- so utterly dissimilar to anything I had ever learned from Professor Wogglebug's geometry pills -- and occasionally trying to lay out baseball diamonds and football fields for the perpetually unseen inhabitants, or to set up curiously-shaped stones in the formation of tenpins, which invariably toppled down because of the peculiar tilt of the ground long before I could bowl them over with the black cinder-like spheroids that sometimes lay about.