‖Tar′di‐gra″da (?), n. pl. [NL. See Tardigrade, a.] 1. (Zoöl.) A tribe of edentates comprising the sloths. They are noted for the slowness of their movements when on the ground. See Sloth, 3.
2. (Zoöl.) An order of minute aquatic arachnids; — called also bear animalcules, sloth animalcules, and water bears.