n. [ Meso- + Gr. de`rma skin. ] (Biol.) (a) The layer of the blastoderm, between the ectoderm and endoderm; mesoblast. See Illust. of Blastoderm and Ectoderm. (b) The middle body layer in some invertebrates. (c) The middle layer of tissue in some vegetable structures. [ 1913 Webster ]
n. [ Meso- + Gr. de`rma skin. ] (Biol.) (a) The layer of the blastoderm, between the ectoderm and endoderm; mesoblast. See Illust. of Blastoderm and Ectoderm. (b) The middle body layer in some invertebrates. (c) The middle layer of tissue in some vegetable structures. [ 1913 Webster ]