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1. Oxford American Dictionary

   blastoderm

   • IPA[ˈblastəˌdərm]

   美式

   • n.
     the layer of embryonic tissue that forms prior to the development of the embryonic axis.；the outer layer of cells that forms the wall of a blastula.

   • noun: blastoderm, plural noun: blastoderms

2. • 更多解釋

   blastoderm

   • IPA[ˈblastə(ʊ)dəːm]

   英式

   • n.
     a blastula having the form of a disc of cells on top of the yolk.

   Oxford Dictionary