Eucoelomata
Eu·coe·lo·ma·ta (u″se-lo-maґtə) the major division of the higher invertebrates, including mollusks, annelids, arthropods, echinoderms, and chordates, which all have a separate mouth and anus, a true coelom, and a well-developed circulatory system. It is divided into two series, the Deuterostomia and the Protostomia.
Medical dictionary.
2011.