Cranium \Cra"ni*um\ (kr?"n?-?m), n.; pl. E. {Craniums} (-?mz),
L. {Crania} (-?). [NL., fr. Gr. ????; akin to ka`ra head.]
The skull of an animal; especially, that part of the skull,
either cartilaginous or bony, which immediately incloses the
brain; the brain case or brainpan. See {Skull}.
[1913 Webster]