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tardigrade

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noun tar·di·grade \ˈtär-də-ˌgrād\

Definition of tardigrade

  1. :  any of a phylum (Tardigrada) of microscopic invertebrates with four pairs of stout legs that live usually in water or damp moss —called also water bear



Origin of tardigrade

ultimately from Latin tardigradus slow-moving, from tardus slow + gradi to step, go — more at grade


First Known Use: 1860


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