skeletal
adj.adj. relating to the bones in your body. It can also describe someone who is extremely thin or a plan that only has the most basic parts.
adj. relating to or functioning as a skeleton; by extension, reduced to the essential or minimal parts. Often used to describe physical appearance or organizational structures.
The doctor showed me a skeletal diagram of the hand.
After months of famine, the refugees arrived at the camp in a skeletal condition, requiring immediate medical intervention.
The new administration began with a skeletal staff, focusing only on the most urgent legislative priorities while they vetted candidates for more permanent roles.
From skeleton + -al.
Often used predicatively after 'look' or 'appear' when describing physical thinness; used attributively when referring to biology or basic structures.