| Answer | Crossword Clue |
|---|---|
| ellipsoids | ELLIPSOID, a solid, all plane sections of which are ellipses or circles |
| ellipsoid | a solid, all plane sections of which are ellipses or circles |
| ellipsoids | a surface all plane sections of which are ellipses or circles |
| hyperboloids | A solid or surface having plane sections that are hyperbolas, ellipses, or circles |
| hyperboloid | A solid or surface having plane sections that are hyperbolas, ellipses, or circles |
| ellipsoid | A three-dimensional figure symmetrical around each of three perpendicular axes, whose plane sections normal to one axis are circles and all the other plane sections are ellipses |
