Definition of Porifera
: a phylum of primitive invertebrate animals comprising the sponges and having a cellular grade of construction without true tissue or organ formation but with the body permeated by canals and chambers through which a current of water flows and passes in its course through one or more cavities lined with choanocytes
poriferan\-rən\ adjective or noun
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Origin and Etymology of porifera
New Latin, from Latin porus pore + -i- + -fera, neuter plural of -fer -ferous
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