Dictionary

tardigrade

noun tar·di·grade \ˈtär-də-ˌgrād\

Definition of TARDIGRADE

:  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
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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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