Of or relating to or forming or attached to a skeleton. "Skeletal bones" , "Skeletal muscles"
2.
Very thin especially from disease or hunger or cold. Synonyms:bony, cadaverous, emaciated, gaunt, haggard, pinched, wasted."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"
