a solid formed by rotating
around either axis: its plane sections are all ellipses or circles
the surface of such a solid
of or shaped like an ellipsoid also ˌel‧lip‧ˈsoi‧dal (ˌɛlɪpˈsɔɪdəl; eˌlipsoidˈ'l)
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.