Kuubik

Kuubik is an Estonian noun that denotes a cube, a three-dimensional solid with six square faces. In geometry, a kuubik is a regular hexahedron; all three-dimensional edges have equal length. If the edge length is a, the volume is a^3 and the surface area is 6a^2. The space diagonal is a√3.

In number theory, numbers of the form n^3 are called cubic numbers; in mathematical texts the cube is described in terms of the exponent 3.

In everyday language, kuubik is used to describe anything that has the shape of a cube, such as dice or small blocks. The world-famous puzzle known in English as the Rubik's Cube is referred to in Estonian as Rubik'i kuubik, highlighting its cubical form.

In education and science, kuubik appears in diagrams, models, and software that represent three-dimensional objects, and it serves as a foundational primitive in 3D modeling and computer graphics.

The term is primarily used within Estonian but is cognate to similar words in other languages that denote a cube or cubic form.