Refine this word faster

Exoskeleton

noun

Noun

1
A hard outer structure that provides both structure and protection to creatures such as insects and Crustacea.
"This is the case not only with all forms provided with exoskeleta and endoskeleta, into the composition of which lime largely enters, but also with those which exercise the precipitating effect on the calcium salts they absorb from sea water, the precipitation rarely going so far as to form a distinct deposit in the cells or tissues of the organism."
2
the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs wordnet
3
A wearable robotic machine used for aided or augmented mobility.

From exo- + skeleton.

Unscramble this word: exoskeleton