1) Abstract 2) Abstractionist 3) Geometric 4) Nonfigurative 5) Nonobjective 6) Protogeometric 7) Schematic 8) Semiabstract 
Art without reference to anything outside itself-without representation. Also called nonobjective-without recognizable objects.
[adj] - art
adjective of or relating to a style of art in which objects do not resemble those known in physical nature;
not resembling or portraying any object in physical nature: a nonrepresentational painting.