celoma

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun anatomy A cavity in the mesoderm of a vertebrate embryo that gives rise to the pleural, pericardial and peritoneal cavities

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity