What does "cubical" mean?

Cubical: (Crystallog.) Isometric or monometric; as, cubic cleavage. See Crystallization. Cubic equation, an equation in which the highest power of the unknown quantity is a cube. -- Cubic foot, a volume equivalent to a cubical solid which measures a foot in each of its dimensions. -- Cubic number, a number produced by multiplying a number into itself, and that product again by the same number. See Cube. -- Cubical parabola (Geom.), two curves of the third degree, one plane, and one on space of three dimensions.