. "Duocylinder"@en . . . . "1"^^ . . "A duocylinder is the four dimensional rotatope created from the product of two discs. It can therefore be considered to be a duoprism of two discs. It is composed of two torus-like cells joined by a single 2-D surface."@en . "4"^^ . "2"^^ . . "1"^^ . "A duocylinder is the four dimensional rotatope created from the product of two discs. It can therefore be considered to be a duoprism of two discs. It is composed of two torus-like cells joined by a single 2-D surface."@en .