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  • Webster's Revised Unabridged Dictionary
    • n Archiblastula (Biol) A hollow blastula, supposed to be the primitive form; a c┼ôloblastula.
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Century Dictionary and Cyclopedia
    • n archiblastula In embryology, a hollow and usually globular vesicle, the walls of which consist of a single layer of similar cells, and which by invagination develops an archigastrula.
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Webster's Revised Unabridged Dictionary
Pref. archi, + blastula,