amphicytula

Century Dictionary and Cyclopedia

1. 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. The human egg is an example. This is the usual form of egg in mammals and sundry other animals. See gastrulation.