Usually occurs in sessile colonies

• Primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Poriferan \Po*rif"er*an\, n. (Zo["o]l.) One of the Polifera.

Wiktionary Word definitions in Wiktionary
n. (context biology English) Any sponge of the phylum ''Porifera''.

WordNet Word definitions in WordNet
n. primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies [syn: sponge , parazoan ]