Hermit-crab meaning

Any of various decapod crustaceans of the superfamily Paguroidea that have a soft asymmetrical abdomen and occupy the empty shells of gastropod mollusks.
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Any of various crabs (esp. family Paguridae) that have asymmetrical, soft abdomens and that live in the empty shells of certain mollusks, as snails.
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A type of crab from the superfamily Paguroidea, which salvages empty seashells or other portable objects to permanently shelter and protect their soft abdomens.
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