coelenterate

1. N any invertebrate of the phylum Cnidaria (formerly Coelenterata), having a saclike body with a single opening (mouth), which occurs in polyp and medusa forms. Coelenterates include the hydra, jellyfishes, sea anemones, and corals 腔肠动物门动物

2. ADJ (loosely) any invertebrate of the phyla Cnidaria or Ctenophora 腔肠动物的