[ 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

First recorded in 1830–40; endo- + skeleton

Related forms

en·do·skel·e·tal, adjective
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Examples from the Web for endoskeleton

British Dictionary definitions for endoskeleton


/ (ˌɛndəʊˈskɛlɪtən) /


the internal skeleton of an animal, esp the bony or cartilaginous skeleton of vertebratesCompare 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

Medicine definitions for endoskeleton


[ ĕn′dō-skĕlĭ-tn ]


An internal supporting skeleton, derived from the mesoderm, that is characteristic of vertebrates and certain invertebrates.

Related forms

en′do•skele•tal (-ĭ-tl) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for endoskeleton


[ ĕn′dō-skĕlĭ-tn ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.