From The Collaborative International Dictionary of English v.0.48 [gcide]:
Poriferan \Po*rif"er*an\, n. (Zool.)
One of the Polifera.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
poriferan
n 1: primitive multicellular marine animal whose porous body is
supported by a fibrous skeletal framework; usually occurs
in sessile colonies [syn: sponge, poriferan,
parazoan]