Hypertext Webster Gateway: "mesoderm"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Mesoderm \Mes"o*derm\, n. [Meso- + Gr. ? 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.
From WordNet (r) 1.7 (wn)
mesoderm
n : the middle germ layer that develops into muscle and bone and
cartilage and blood and connective tissue [syn: {mesoblast}]
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