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

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

noun. 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.

noun. 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.

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

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

"5 The process is repeated again and again, so that the two cells are succeeded by four, eight, sixteen, thirty-two, and so on, with the result that a mass of cells is found within the zona striata, and to this mass the term morula is applied (Fig. 9)."

conceptus  embryo  fertilized egg  

blastosphere  morulae  mulberry mass  segmentation  segmentation sphere