A cupolarotunda in which the bases are in opposite orientations.
Gyrocupolarotunda
See also
OrthocupolarotundaExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Gyrocupolarotunda." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Gyrocupolarotunda.html