coffin bone

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coffin bone

n.
The bone enclosed inside a horse's hoof.
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.

coffin bone

n
(Zoology) the terminal phalangeal bone inside the hoof of the horse and similar animals
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

cof′fin bone`


n.
the terminal phalanx in the foot of the horse and allied animals, enclosed in the hoof.
[1710–20]
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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References in periodicals archive
The three-phalange bones that are closest to the ground are the long pastern, short pastern and coffin bone. They should be in a chiropractic alignment, of sorts, which results in a maximum advantage for the horse to utilize his weight-bearing capacity to its fullest ability.
The corium, a dermo-epidermal, highly vascularized layer between the wall and the coffin bone, has a parallel, laminar shape and is named the laminae.
The coffin bone provides the shape of the foot and the rigidity needed to bear weight.
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