CUBE Copy link • CUBEcubus (κὐβος, as geometrical body; pure Latin, quadrantal, *Gell., i., 20): figura ex omni latere quadrata (as figure, ibid): corpus ex sex lateribus aequali latitudine planitierum perquadratum (Vitrvius, 5 Praef.): in the form of a cube, *cubo similis. A cube (= cubic number), cubus (Gell., 1, 20). As adjective The cube root, *radix cubica.