acephalia

a. [ L. cephalicus, Gr. &unr_;, fr. kefalh` head: cf. F. céphalique. ] (Anat.) Of or pertaining to the head. See the Note under Anterior. [ 1913 Webster ]

Cephalic index (Anat.), the ratio of the breadth of the cranium to the length, which is taken as the standard, and equal to 100; the breadth index. --
Cephalic vein, a large vein running from the back of the head alond the arm; -- so named because the ancients used to open it for disorders of the head. Dunglison. [ 1913 Webster ]