- 1. n. That stage in the development of the ovum in which the outer cells of the morula become more defined and form the blastoderm. Source: opted
- 2. 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 Source: wordnet
- 3. That stage in the development of the ovum in which the outer cells of the morula become more defined and form the blastoderm. Source: webster
- 4. That stage in the development of the ovum in which the outercells of the morula become more defined and form the blastoderm. Source: adambom
- 5. 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 Source: ecdict
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