parazoan

noun

1. any member of a group of invertebrates comprising the phylum Porifera, the sponges.

adjective

2. of or relating to a parazoan organism.

noun plural -zoa (-ˈzəʊə)

1. any multicellular invertebrate of the group Parazoa, which consists of the sponges (phylum Porifera)Compare metazoan