Judged: two independent readers; copy check clear.
cephalic index
cephalic index Cephalic index is the ratio of the maximum width of the skull or head to its maximum front-to-back length.
Cephalic index is the ratio of the maximum width of the skull or head to its maximum front-to-back length. In this historical source, it is used to describe head shape, with lower values indicating a relatively longer head.