Yours, Etc.: Origins and Uses of 8 Sign-Offs
"pertaining to the head," early 15c., from Latin cephalicus, from Greek kephalikos "pertaining to the head," from kephale (see cephalo-).
cephalic ce·phal·ic (sə-fāl'ĭk)adj.
Of or relating to the head.
Located on, in, or near the head.
-cephalic suff. Having a specified kind or number of heads: dolichocephalic.