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The ratio of the maximum width of the head to its maximum length, multiplied by 100.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Anatomy) the ratio of the greatest width of the human head to its greatest length, multiplied by 100
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the ratio of the greatest breadth of the head to its greatest length from front to back, multiplied by 100.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||cephalic index - ratio (in percent) of the maximum breadth to the maximum length of a skull|
ratio - the relative magnitudes of two quantities (usually expressed as a quotient)
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