
In nematodes: Body cavity containing a fluid in which the various internal organs are suspended.
Found on
http://ppathw3.cals.cornell.edu/glossary/Defs_P.htm

(from the article `aschelminth`) Aschelminths have in common a body cavity, the pseudocoel, that arises in the embryo in a way different from that found in more advanced animals and ... Nematoda, Rotifera, and a number of other smaller eumetazoan classes and phyla have a fluid-filled cavity, called the pseudocoelom, that arises from ......
Found on
http://www.britannica.com/eb/a-z/p/126

An internal fluid-filled body cavity within an organism other than the gut which lies between the gut (derived from the endoderm) and the muscles (derived from the mesoderm) of the outer body wall (derived from the ectoderm). It may contain other organs besides the gut. It is derived from the blastocoel during embryonic development. It is found in ...
Found on
http://www.encyclo.co.uk/local/20973

the body cavity of certain invertebrate metazoan animals between the body wall and the intestine, which is not lined with a mesodermal epithelium.
Found on
https://www.infoplease.com/dictionary/pseudocoel
No exact match found.