cu·bic 
/ˈkju:bɪk/ adjective
/ˈkju:bɪk/ adjective [more cubic; most cubic] 1 — used to describe a measurement that is produced by multiplying something's length by its width and its height ▪ one cubic centimeter [=a measure of volume that is one centimeter long, one centimeter wide, and one centimeter high] ▪ three cubic feet of space — compare 2square 2 2 : in the shape of a cube
▪ cubic crystals/shapes ▪ a cubic structure
▪ cubic crystals/shapes ▪ a cubic structure
