Definitions

from The Century Dictionary.

  • noun In embryology, that from of metagastrula, or kenogenetic gastrula, which results from surface-cleavage of the egg, or superficial segmentation of the vitellus. Also called bladder-gastrula.

Etymologies

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Examples

  • This is the only material difference between our vesicular gastrula (perigastrula) and the original form of the bell-gastrula

    The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876

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