- an external covering or integument, especially when hard, as the shells of crustaceans (opposed to endoskeleton).
Origin of exoskeleton
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for exoskeletal
The skin of the Newt is quite devoid of any exoskeletal structures.
In Teleostei dental plates are usually developed as an exoskeletal covering on parts of the branchial arches.The Works of Francis Maitland Balfour, Volume III (of 4)
Francis Maitland Balfour
Frequently, however, this exoskeletal somite may be differentiated into various regions.
The skin of the frog is smooth and quite devoid of scales or other exoskeletal structures.
The teeth are exoskeletal structures, partly of dermal, partly of epidermal origin.
- the protective or supporting structure covering the outside of the body of many animals, such as the thick cuticle of arthropodsCompare endoskeleton
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
Word Origin and History for exoskeletal
Online Etymology Dictionary, © 2010 Douglas Harper
- All hard parts, such as hair, teeth, and nails, that develop from the ectoderm or mesoderm in vertebrates.
- A hard outer structure, such as the shell of an insect, that provides protection or support for an organism.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- A hard, protective outer body covering of an animal, such as an insect, crustacean, or mollusk. The exoskeletons of insects and crustaceans are largely made of chitin. Compare endoskeleton.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.