Definition of Pseudocoelomata
in some classifications
: a group comprising lower invertebrates in which there is a body cavity that either lacks a mesodermal lining or has one derived from wandering mesenchymal cells, including rotifers, nematodes, bryozoans, and related forms, and being basically equivalent to Aschelminthes
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Origin and Etymology of pseudocoelomata
New Latin, from pseud- + Coelomata
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