Glome
A glome is a 4-sphere (in the geometer's sense of the word)
| x^2+y^2+z^2+w^2=r^2 |
(as opposed to the usual 3-sphere). The term derives from the Latin "glomus" meaning "ball of string."
See also
Ball, Closed Ball, Hypersphere, Open Ball, SphereExplore with Wolfram|Alpha
WolframAlpha
More things to try:
Cite this as:
Weisstein, Eric W. "Glome." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Glome.html