The Collaborative International Dictionary of English v.0.48:
chordamesoderm \chordamesoderm\, chordomesoderm \chordomesoderm\n. (Embryology) the area of the mesoderm that forms the notochord. [WordNet 1.5]WordNet (r) 3.0 (2006):
chordamesoderm n 1: the area of mesoderm that forms the notochord [syn: chordamesoderm, chordomesoderm]