skull

nouns

the bony skeleton of the head of vertebrates
skull
is a part of
the upper part of the human body or the front part of the body in animals; contains the face and brains
"he stuck his head out the window"
caput, head
is a part of
the part of the skeleton that includes the skull and spinal column and sternum and ribs
axial skeleton
is a type of (narrower)
rigid connective tissue that makes up the skeleton of vertebrates
bone, os