The Collaborative International Dictionary of English v.0.48:
braincase \brain"case\ n. the part of the skull that encloses the brain. Syn: cranium, brainpan. [WordNet 1.5]WordNet (r) 3.0 (2006):
braincase n 1: the part of the skull that encloses the brain [syn: cranium, braincase, brainpan]