endoskeleton

[en-doh-skel-i-tn]
noun Zoology.
the internal skeleton or framework of the body of an animal (opposed to exoskeleton ).

Origin:
1830–40; endo- + skeleton

endoskeletal, adjective
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World English Dictionary
endoskeleton (ˌɛndəʊˈskɛlɪtən)
 
n
Compare exoskeleton the internal skeleton of an animal, esp the bony or cartilaginous skeleton of vertebrates
 
endo'skeletal
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

endoskeleton
c.1840, from endo- + skeleton.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

endoskeleton en·do·skel·e·ton (ěn'dō-skěl'ĭ-tn)
n.
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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American Heritage
Science Dictionary
endoskeleton   (ěn'dō-skěl'ĭ-tn)  Pronunciation Key 
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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Example sentences
In comparison, turtle shells are part of the vertebrate animal's so-called endoskeleton, or skeleton from within the body.
The interior of the body is supported by a bony endoskeleton.
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