Wordnet 3.0
NOUN (1)
1.
in some classifications considered a separate phylum: microscopic arachnid-like invertebrates living in water or damp moss having 4 pairs of legs and instead of a mouth a pair of stylets or needlelike piercing organs connected with the pharynx;
[syn: Tardigrada, class Tardigrada]
WordNet (r) 3.0 (2006):
class Tardigrada
n 1: in some classifications considered a separate phylum:
microscopic arachnid-like invertebrates living in water or
damp moss having 4 pairs of legs and instead of a mouth a
pair of stylets or needlelike piercing organs connected
with the pharynx [syn: Tardigrada, class Tardigrada]