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[en-doh-skel-i-tn] /ˌɛn doʊˈskɛl ɪ tn/
noun, Zoology
the internal skeleton or framework of the body of an animal (opposed to exoskeleton).
Origin of endoskeleton
1830-40; endo- + skeleton
Related forms
endoskeletal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for endoskeleton


the internal skeleton of an animal, esp the bony or cartilaginous skeleton of vertebrates Compare exoskeleton
Derived Forms
endoskeletal, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for endoskeleton

1838, from endo- + skeleton.

Online Etymology Dictionary, © 2010 Douglas Harper
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endoskeleton in Medicine

endoskeleton en·do·skel·e·ton (ěn'dō-skěl'ĭ-tn)
An internal supporting skeleton, derived from the mesoderm, that is characteristic of vertebrates and certain invertebrates.

en'do·skel'e·tal (-ĭ-tl) 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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endoskeleton in Science
The internal supporting framework of humans and other vertebrates, usually made of bone. Certain invertebrates, such as sponges and echinoderms, also have endoskeletons. Compare exoskeleton.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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