from The Century Dictionary and Cyclopedia

  • n. In embryology, the parent-cell (cytula) which results from that stage in the development of a holoblastic egg known as an amphimonerula, by the re-formation of a nucleus, and which passes by total but unequal segmentation of the vitellus (yolk) to the successive stages known as amphimorula, amphiblastula, and amphigastrula. See these words.


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