Medical Dictionary


noun exo·skel·e·ton \ˌek-sō-ˈskel-ət-ən\

Medical Definition of EXOSKELETON

:  an external supportive covering of an animal (as the system of sclerites covering the body of an insect)—compare endoskeleton
:  bony or horny parts (as nails, hooves, or scales) of a vertebrate produced from epidermal tissues
exo·skel·e·tal \-ət-əl\ adjective


July 01, 2015
precarious Hear it
not certain, secure, or steady
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears