blas·to·pore /ˈblæstəˌpor, ˌpɔr/
  胚孔
  blas·to·pore /ˈblæstəˌpo(ə)r, ˌpɔ(ə)r/ 名詞
  胚孔
  Blas·to·pore n.  Biol. The pore or opening leading into the cavity of invagination, or archenteron.
  Note: [See Illust. of Invagination.]
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  blastopore
       n : the opening into the archenteron