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
Origin of tardigrade
ultimately from Latin tardigradus slow-moving, from tardus slow + gradi to step, go — more at grade
First Known Use: 1860
Learn More about tardigrade
Britannica.com: Encyclopedia article about "tardigrade"
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