from The Century Dictionary and Cyclopedia

  • n. In embryology, the morula or mulberry-mass which results from the partial and superficial segmentation of the vitellus of a pericytula, and proceeds to develop into a periblastula and perigastrula. It is a body in which an external cell-stratum surrounds and incloses an unsegmented mass of nutritive yolk. See pericytula.


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