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mesoderm n. 中胚葉 中胚葉 mesoderm n 1: the middle germ layer that develops into muscle and bone and cartilage and blood and connective tissue [synonym: {mesoderm}, {mesoblast}] 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]
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