noun, plural calcanei [kal-key-nee-ahy] .
Anatomy. the largest tarsal bone, forming the prominence of the heel.
Zoology. the corresponding bone in other vertebrates.
Also, calcaneum.
Also called heel bone.

1920–25; < Late Latin: heel, noun use of calcāneus of the heel; see calcaneum

calcaneal, calcanean, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
calcaneus or calcaneum (kælˈkeɪnɪəs, kælˈkeɪnɪəm)
n , pl -nei, -nea
1.  Nontechnical name: heel bone the largest tarsal bone, forming the heel in man
2.  the corresponding bone in other vertebrates
[C19: from Late Latin: heel, from Latin calx heel]
calcaneum or calcaneum (kælˈkeɪnɪəs, kælˈkeɪnɪəm, -nɪˌaɪ, -nɪə)
[C19: from Late Latin: heel, from Latin calx heel]
cal'caneal or calcaneum
cal'canean or calcaneum

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

from L. (os) calcaneum "bone of the heel," from calcem (nom. calx (1)) "heel."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

calcaneus cal·ca·ne·us (kāl-kā'nē-əs) or cal·ca·ne·um (-nē-əm)
n. pl. cal·ca·ne·i (-nē-ī') or cal·ca·ne·a (-nē-ə)
The quadrangular bone at the back of the tarsus, the largest of the tarsal bones. Also called heel bone.

cal·ca'ne·al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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