/ Dictionary / Index P Porifera: Meaning and Definition of Find definitions for: Po•rif•er•a Pronunciation: (pô-rif'ur-u, pō-, pu-), [key] — n. an animal phylum comprising the sponges. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: porifera (Thesaurus) Pori poriferan Related Content Daily Word Quiz: prevalent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language