| Definition of 'Porifera' |
Princeton's WordNet |
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1. (noun) Porifera, phylum Porifera
coextensive with the subkingdom Parazoa: sponges
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| Definition of 'Porifera' |
Webster Dictionary |
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1. Porifera
a grand division of the Invertebrata, including the sponges; -- called also Spongiae, Spongida, and Spongiozoa. The principal divisions are Calcispongiae, Keratosa or Fibrospongiae, and Silicea
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| Definition of 'Porifera' |
U.S. National Library of Medicine |
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1. Porifera
The phylum of sponges which are sessile, suspension-feeding, multicellular animals that utilize flagellated cells called choanocytes to circulate water. Most are hermaphroditic. They are probably an early evolutionary side branch that gave rise to no other group of animals. Except for about 150 freshwater species, sponges are marine animals. They are a source of ALKALOIDS; STEROLS; and other complex molecules useful in medicine and biological research.
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Definitions of Porifera 
