1. [adj]  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"
2. [adj]  of or relating to or forming or attached to a skeleton; "the skeletal system"; "skeletal bones"; "skeletal muscles"

SKELETAL is a 8 letter word that starts with S.