skeletal

of or relating to or forming or attached to a skeleton

• “the skeletal system”
• “skeletal bones”
• “skeletal muscles”

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”