Morula is a biological term that refers to a stage of embryonic development in some animals. However, there are several synonyms for this word that can be used to describe this stage. One common alternative is "mulberry stage," which is named for the appearance of the developing embryo, which resembles a cluster of mulberries. Another synonym is "blastocyst," which is a mammalian stage of embryo development that follows the morula stage. In addition, some species refer to this stage as a "berry-like body" or simply the "early embryo." Regardless of the specific term used, the morula stage is an important step in the development of many animals, including humans, and marks the beginning of the differentiation process that will ultimately result in the formation of specialized tissues and organs.