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  • Definition
    • embryo : In the reproductive cycle, the stage after the fertilization of the egg that precedes the development into a fetus.

      • embryo : An organism in the earlier stages of development before it emerges from the egg, or before metamorphosis.

        • embryo : In viviparous animals, the young animal's earliest stages in the mother's body.

          • embryo : In humans, usually the cell growth of the child within the mother's body, through the end of the seventh week of pregnancy.

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          • Derivative