cephalic index n the ratio multiplied by 100 of the maximum breadth of the head to its maximum length compare CRANIAL INDEX
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a measure of the shape of a skull, commonly used in craniometry: the ratio of the greatest breadth, multiplied by 100, to the greatest length of the skull. See also brachycephaly, dolichocephaly.
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100 times the maximal head breadth divided by the maximal head length.Medical dictionary. 2011.