frontal index

frontal index

[¦frənt·əl ′in‚deks]
(anthropology)
The ratio of the least to the greatest breadth of the forehead multiplied by 100.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Frons yellowish brown frontal length 0.5 (0.4) mm; frontal index = 1.0 (0.97), top to bottom width ratio = 1.4 (1.4).
Frons yellowish brown frontal length 0.3 (0.4) mm; frontal index = 0.7 (1.0), top to bottom width ratio = 1.4 (1.4).
In addition, we determined the frontal index size: the ratio of frontal spinal canal size to the frontal size of vertebral body at L1-L5.
Frons slightly convergent dorsally, frontal index (width of frons just below anterior ocellus/ width of head) 0.27-0.36.
Frons parallel-sided, frontal index (width of frons just below anterior ocellus/ width of head) 0.29-0.31.
Frons yellowish brown, frontal length 0.40 mm; frontal index = 0.78 (0.83), top to bottom width ratio = 1.31 (1.31).