Definition of blastopore in English:

blastopore

Syllabification: blas·to·pore
Pronunciation: /ˈblastəˌpôr/

Entry from US English dictionary

noun

The opening of the central cavity of an embryo in the early stage of development.

Definition of blastopore in:

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Word of the day neoteny
Pronunciation: niːˈɒt(ə)ni
noun
retention of juvenile features in the adult animal