1.
[syn: Cnidaria, phylum Cnidaria, Coelenterata, phylum Coelenterata]
The Collaborative International Dictionary of English v.0.48:
Cnidaria \Cni*da"ri*a\ (n[i^]*d[=a]"r[i^]*[.a]), n. pl. [NL. See
Cnida.] (Zool.)
A comprehensive group equivalent to the true C[oe]lenterata,
i. e., exclusive of the sponges. They are so named from
presence of stinging cells (cnidae) in the tissues. See
Coelenterata.
[1913 Webster]
WordNet (r) 3.0 (2006):
Cnidaria
n 1: hydras; polyps; jellyfishes; sea anemones; corals [syn:
Cnidaria, phylum Cnidaria, Coelenterata, phylum
Coelenterata]