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Definitions for: Blastula [n] early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
Webster (1913) Definition: Blas"tu*la, n. [NL., dim. of Gr. blasto`s a sprout.]
(Biol.)
That stage in the development of the ovum in which the outer
cells of the morula become more defined and form the
blastoderm.
Synonyms: blastodermic vesicle
See Also: blastocele, blastocoel, blastocoele, blastocyst, blastosphere, cleavage cavity, conceptus, embryo, fertilized egg, segmentation cavity
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