|sü(ˌ)dō+ noun plural
Usage: capitalized
Etymology: New Latin, from pseud- + Coelomata
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