A birotunda consists of two adjoined rotundas.
Birotunda
See also
Bilunabirotunda, Cupolarotunda, Elongated Pentagonal Gyrocupolarotunda, Elongated Pentagonal Orthobirotunda, Elongated Pentagonal Orthocupolarotunda, Gyrocupolarotunda, Gyroelongated Pentagonal Birotunda, Gyroelongated Pentagonal Rotunda, Orthobirotunda, Triangular HebesphenorotundaExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Birotunda." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Birotunda.html