skeletal structure ske·le·talst·ructure uncommon noun 1. any structure created by the skeleton of an organism Synonymsskeletal structure Related words Broader terms structure Narrower terms rib cagearchheelgirdleappendicular skeletonaxial skeletonspinal columnmetacarpus Parts skeletal system WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.