| cranial index | |
| —n | |
| Compare cephalic index the ratio of the greatest length to the greatest width of the cranium, multiplied by 100: used in comparative anthropology | |
| a chattering or flighty, light-headed person. |
| a fool or simpleton; ninny. |
cranial index n.
The ratio of the maximum breadth to the maximum length of the skull, multiplied by 100.