noun \ˌek-sō-ˈskel-ət-ən\

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

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