Brittle-star definitions

Any of various marine echinoderms of the order Ophiurida having long slender arms.
noun
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Any of a subclass (Ophiuroidea) of echinoderms having a central disk and five long, narrow, easily breakable arms that can quickly regenerate.
noun
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Any of various echinoderms, of the class Ophiuroidea, that resemble starfish and have long, slender arms that regenerate when snapped off.
noun
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