The
cephalic index is a measurement first used in
physical anthropology:
the ratio of the length of the head to its breadth, sometimes multiplied by 100 for convenience.
Except for descriptions of individuals' appearances, it is of little use, and has no correlation with behavior.
Cephalic indices are grouped as
- dolichocephalic, or "long head"
- mesocephalic, or "moderate head"
- brachycephalic, or "short head"