morula /môr″ələ/ pl. morulas, morulae [L, morulus, blackberry] , a solid, spherical mass of cells resulting from the cleavage of the fertilized ovum in the early stages of embryonic development. It represents an intermediate stage between the zygote and the blastocyst and consists of blastomeres that are uniform in size, shape, and physiological capabilities. −morular, adj.
