morula

The spherical embryonic mass of blastomeres formed before the blastula and resulting from cleavage of the fertilized ovum.

In embryology, the condition (resembling a mulberry) of an ovum after complete segmentation of the vitellus or yolk and before the formation of a blastula, when the contents are a mass of cells derived by cleavage of the original and successively formed nuclei; a mulberry-mass of blastomeres or cleavage-cells. See monerula, blastula, gastrula, and cut under gastrulation.

In pathology, same as button-scurvy (which see, under scurvy).

The sphere or globular mass of cells (blastomeres), formed by the clevage of the ovum or egg in the first stages of its development; — called also mulberry mass, segmentation sphere, and blastosphere. See segmentation.

A spherical mass of blastomeres that forms following the splitting of a zygote; it becomes the blastula.

a solid mass of blastomeres that forms when the zygote splits; develops into the blastula