The Collaborative International Dictionary of English v.0.48:
Acrocephaly \Ac`ro*ceph"a*ly\, n. Loftiness of skull. [1913 Webster]WordNet (r) 3.0 (2006):
acrocephaly n 1: a congenital abnormality of the skull; the top of the skull assumes a cone shape [syn: oxycephaly, acrocephaly]