Source : Webster's Revised Unabridged Dictionary (1913)

Poriferan \Po*rif"er*an\, n. (Zo["o]l.)
   One of the Polifera.

Source : WordNet®

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