skeletal

Short definition from Wiktionary

Noun

1. 1
   Shorthand for skeletal diagram (a black-and-white drawing of a [usually extinct] animal’s skeleton to be used as a reference for paleoart)

Adjective

1. 1
   of, or relating to the skeleton
2. 2
   haggard, cadaverous, emaciated or gaunt
3. 3
   barebones, lacking elaboration