Definify.com

Webster 1913 Edition

Adj.

[

Meso-

cephalic

(Anat.)

(a)

Of or pertaining to, or in the region of, the middle of the head;

as, the

mesocephalic

flexure

(b)

Having the cranial cavity of medium capacity; neither megacephalic nor microcephalic.

(c)

Having the ratio of the length to the breadth of the cranium a medium one; mesaticephalic.

mesocephalic ‎(comparative more mesocephalic, superlative most mesocephalic)

(of a person or animal) Having a head that is not particularly short or long from front to back (relative to its width from left to right).

mesocephalic ‎(plural mesocephalics)

William H. Tucker, The Science and Politics of Racial Research, University of Illinois Press (1996), ISBN 9780252065606, page 23: Also a subject of extensive investigation was the cephalic index, a measurement of the general shape of the skull, defined as the ratio of its breadth to its length multiplied by one hundred to eliminate the decimal point. Ratios below seventy-five indicated skulls that were long and narrow, termed “dolichocephalic”; those between seventy-five and eight, slightly broader or “mesocephalic”; and even rounder heads with ratios above eighty were called “brachycephalic.”