ox·y·ceph·a·ly 
(ŏk′sē-sĕfə-lē)
(ŏk′sē-sĕfə-lē)n. pl. ox·y·ceph·a·lies
A congenital abnormality of the skull in which the top of the head assumes a conical or pointed shape. Also called acrocephaly.
[From Greek oxukephalos, sharp-headed : oxus, sharp; see OXYGEN + -kephalos, -cephalous.]
ox′y·ce·phalic (-sə-fălĭk), ox′y·cepha·lous adj.