skeletal

adj. pertaining to the skeleton; resembling a skeleton; forming a skeleton; extremely thin

In biology, the skeleton or skeletal system is the biological system providing physical support in living organisms. (By extension, non-biological outline structures such as gantries or buildings may also acquire skeletons.)
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Skeletal /skel·e·tal/ pertaining to the skeleton. skeletal pertaining to the skeleton. See also skeletal muscle. [more]Skeletal - Community and Resources

Adjective
1. of or relating to or forming or attached to a skeleton; "the skeletal system"; "skeletal bones"; "skeletal muscles"
(pertainym) skeletal system, skeleton, frame, systema skeletale
2. very thin especially from disease or hunger or cold; "emaciated bony hands"; "a nightmare population of gaunt men and skeletal boys"; "eyes were haggard and cavernous"; "small pinched faces"; "kept life in his wasted frame only by grim concentration"
(synonym) bony, cadaverous, emaciated, gaunt, haggard, pinched, wasted
(similar) thin, lean

(a.)
Pertaining to the skeleton.