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n, pl -zoa (-ˈzəʊə)
(Animals) any multicellular invertebrate of the group Parazoa, which consists of the sponges (phylum Porifera). Compare metazoan
[C19: from parazoa, formed on the model of protozoa and metazoa, from para-1 + Greek zōon animal]
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|Noun||1.||parazoan - primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies|
invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification
glass sponge - a siliceous sponge (with glassy spicules) of the class Hyalospongiae