Mesoderm

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Mesoderm \Mes"o*derm\, 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]

From WordNet (r) 2.0 [wn]:

  mesoderm
       n : the middle germ layer that develops into muscle and bone and
           cartilage and blood and connective tissue [syn: {mesoblast}]