Cnidaria

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

  Cnidaria
       n : hydras; polyps; jellyfishes; sea anemones; corals [syn: {phylum
           Cnidaria}, {Coelenterata}, {phylum Coelenterata}]