The Collaborative International Dictionary
Brachycephalism
Brachycephaly \Brach`y*ceph"a*ly\, Brachycephalism \Brach`y*ceph"a*lism\, n. [Cf. F. Brachyc['e]phalie] . (Anat.) The state or condition of being brachycephalic; shortness of head.
Wiktionary
brachycephalism
n. (dated form of brachycephaly English)