Definitions for "Mesoderm"
The layer of the blastoderm, between the ectoderm and endoderm; mesoblast. See Illust. of Blastoderm and Ectoderm.
The middle body layer in some invertebrates.
The middle layer of tissue in some vegetable structures.
Keywords:  moro, reflex
Moro reflex
Keywords:  blastula, cavity, internal
Internal cavity of blastula