chor·da·mesoderm \|kȯrdə+\noun orchor·do·mesoderm\-dō+\ (-s) Etymology: New Latin chorda or English chord- + mesoderm : the portion of the embryonic mesoderm that forms notochord and related structures and serves as an inductor of ectodermic neural structures • chor·da·mesodermalorchor·do·mesodermal\“+\adjective