cranial index

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cranial index:

see cephalic indexcephalic index
[Gr. kephale=head], ratio of the breadth of the head to its length. Expressed as a percental number, it provides the simplest description of the geometric relation of two dimensions.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Cranial Index


the ratio of the maximum breadth of the skull (transverse diameter) to its maximum length (longitudinal diameter) expressed as a percent. The cranial index is used in anthropology to characterize the shape of the skull in the horizontal plane. Low values reflect a relatively long and narrow skull. An index not greater than 74.9 is indicative of dolichocrany, whereas indexes of 75–79.9 and 80 or greater reflect mesocrany and bradycrany, respectively. The cranial index of humans does not reflect intellectual capacity. The index is used as a means of distinguishing anthropological racial types from skeletons.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

cranial index

[′krān·ē·əl ′in‚deks]
The ratio of maximum skull height to maximum skull breadth multiplied by 100.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.