It is called a Septet.
It is called a seven cube because each pair of opposite faces adds to seven.
In geometry, a heptagon is a polygon with seven sides and seven angles.
A 2D seven sided figure is called a heptagon. A 3D seven faced polygon is called a heptahedron.
A seven sided shape is called a heptagon or a septagon.......
Seven regions are sometimes called the seven
seven seas
They are not generally called seven cubes.
It is called a Septet.
It is called a seven cube because each pair of opposite faces adds to seven.
Seven sisters
A seven sided shape is called a heptagon.
An unrhymed seven line poem is called a Rhapsod.
An element with seven electrons is called nitrogen.
They are called heptagons.
They are called octuplets.
The northern part of India is called Seven Sisters as a symbolic reference for the seven states that became independent from the United Kingdom.