n. 胚盘

[医] 胚盘, 胚层

[ noun ]
a layer of cells on the inside of the blastula
<noun.animal>

Blastoderm \Blas"to*derm\, n. [Gr. blasto`s sprout + E. derm.]
(Embryology)
the early stage of an embryo after the first cleavages of the
ovum; also, the layer of cells of which the early embryo is
composed; specifically:
(a) the early embryo developing from a blastodisc, after the
blastocoel has formed.
(b) in an insect embryo, the layer of cells that surrounds
the internal mass of the yolk.
[PJC]