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Use "exoskeletal" in a sentence
"Biological pathways are contingent, so other worlds could have invented flexible cells with endoskeleton suitable for multicellular organization (eykaryotes), as opposed to rigid exoskeletal cells (prokaryotes), right away."
"And you might see the fielding of exoskeletal units that allow soldiers to carry more weight without additional exertion."
"The Green Berets are also investigating "exoskeletal frames" that commandos would wear like RoboCop to give them superhuman strength for carrying heavy loads and breaking down doors."