- any microscopic, chiefly herbivorous invertebrate of the phylum Tardigrada, living in water, on mosses, lichens, etc.
- belonging or pertaining to the phylum Tardigrada.
- slow in pace or movement.
- any minute aquatic segmented eight-legged invertebrate of the phylum Tardigrada, related to the arthropods, occurring in soil, ditches, etc
- of, relating to, or belonging to the Tardigrada
