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 (sfîr′oid′, sfĕr′-)
A body that is shaped like a sphere but is not perfectly round, especially an ellipsoid that is generated by revolving an ellipse around one of its axes.

sphe·roi′dal (sfĭ-roid′l), sphe·roi′dic (-roi′dĭk) adj.
sphe·roi′dal·ly adv.
sphe′roi·dic′i·ty (-dĭs′ĭ-tē) n.


1. (Mathematics) shaped like an ellipsoid of revolution; approximately spherical
2. (Mathematics) of or relating to an ellipsoid of revolution
spheˈroidally, spheˈroidically adv
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.spheroidal - having the nature or shape of an ellipsoid
rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders"


, spheroidal
n. esferoide, de forma esférica.
References in classic literature ?
This goal lay at a low level in a spheroidal cavity about the size of a large barrel.
In south India, corneal injury was an overwhelming risk factor followed by chronic dacryocystitis, spheroidal degeneration of the cornea, blepharitis, conjunctivitis, pre-existing viral keratitis, bullous keratopathy, dry eyes and exposure keratitis (8,9,17).
a) The temporal distribution of spheroidal fly-ash particles (SFAP) in the sediment sequence of Nohipalu Valgjarv; (b) fossil fuel consumption history in Estonia.
Hafner's Geode collection on the other hand pays ode to the beauty of geodes, the hollow, spheroidal rocks bearing crystals and other precious or semi-precious stones.
Alberti extended length tools are constructed with the same chromium plated, high tensile strength GS 600 spheroidal cast iron bodies and Abec 7 angular contact bearings as the standard length tools.
This cell's roughly prolate spheroidal shape gives data suitable for fitting to a simple 3D surface, whose integration provides the volume.
A subsidiary of Rheinmetall AG, Kolbenschmidt Pierburg supplies aluminum, spheroidal graphite iron and steel pistons from 20 to 640 mm for a wide range of high- and medium-speed engine applications.
The charge 3 and 4, of CGI-s, obtained by modification with FeSiMgCaCe(RE) + FeSiSr, present on the surfaces analyzed, different concentrations of the matrix phases (ferrite: 85%, respectively 100%, and pearlite: 15%, respectively 0%) and different reports between spheroidal graphite separations (20%, respectively 60) and compacted graphite separations (80%, respectively 40%).
An analytical method for estimating the terminal velocities of spheroidal particles in a fluid medium has been derived from a graphical approach proposed by Haider and Levenspiel.
At position B, the PC particles have an approximately spheroidal shape and the size of the particles is smaller than that at the lower temperature.
A method to compute the eigenvalues of the spheroidal wave equations is proposed, as an application of a theorem on eigenvalues of certain classes of infinite matrices.
It was observed in early spermatids at Golgi phase, formation of acrosomal granule contained in the acrosomal vesicle, spheroidal nucleus with rugous reticulum around it, and Golgi apparatus made up of lamellae and vesicular structures.