Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
The ratio of the maximum breadth to the maximum length of the skull, multiplied by 100.
(Anatomy) the ratio of the greatest length to the greatest width of the cranium, multiplied by 100: used in comparative anthropology. Compare cephalic index
the ratio of the greatest breadth of the head to its greatest length from front to back, multiplied by 100.