dorsal

adj 1: belonging to or on or near the back or upper surface of an

animal or organ or part; "the dorsal fin is the

vertical fin on the back of a fish and certain marine

mammals" [ant: {ventral}]

2: (biology) facing away from the axis of an organ or organism;

"the abaxial surface of a leaf is the underside or side

facing away from the stem" [syn: {abaxial}] [ant: {adaxial}]