systema skeletale sys·te·mas·keletale uncommon noun 1. the hard structure (bones and cartilages) that provides a frame for the body of an animal Synonymsskeletal systemskeletonframesystema skeletale Related words Broader terms system Narrower terms endoskeletonexoskeleton Parts musculoskeletal system Part of skeletal structure WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.