Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of blastopore is as below...

Archaeostomatous :: Archaeostomatous (a.) Applied to a gastrula when the blastopore does not entirely close up.

Gastrula :: Gastrula (n.) An embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula (the blastosphere) on one side, thus giving rise to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastraea..

Blastopore :: Blastopore (n.) The pore or opening leading into the cavity of invagination, or archenteron..

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