Etymology
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Words related to skeleton

sclero- 
before vowels scler-, word-forming element meaning "hard," from Latinized form of Greek skleros "hard," related to skellein "to dry up, parch," from PIE *skle-ro-, from root *skele- "to parch, wither."
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exoskeleton (n.)

in zoology, "any hardened external structure," as the shells of crustaceans or the scales and plates of fishes and reptiles, especially when it is of the nature of bone, 1841, from exo- + skeleton. Said to have been introduced by English anatomist Richard Owen. Related: Exoskeletal.

skeletal (adj.)
1849, from skeleton + -al (1). Related: Skeletally.