Mesoderm :: Mesoderm (n.) The layer of the blastoderm, between the ectoderm and endoderm; mesoblast. See Illust. of Blastoderm and Ectoderm..
Mesoderm :: Mesoderm (n.) The middle body layer in some invertebrates.
Mesoderm :: Mesoderm (n.) The middle layer of tissue in some vegetable structures.
Mesodermal :: Mesodermal (a.) Pertaining to, or derived from, the mesoderm; as, mesodermal tissues..