cubic

adjective

• 1having the shape of a cube:a cubic room
• denoting a crystal system or three-dimensional geometrical arrangement having three equal axes at right angles: the sodium and chloride ions form two intersecting cubic structures

• 2denoting a unit of measurement equal to the volume of a cube whose side is one of the linear units specified:15 billion cubic metres of water

• 3involving the cube (and no higher power) of a quantity or variable:a cubic equation

noun

• a cubic equation, or a curve described by one.