1. an early stage of embryonic development consisting of a solid ball of cells formed by repeated division of a fertilized egg
Usage: biology

Examples

• The fertilized egg develops into a morula after several cell divisions.
• During the morula stage, the embryo consists of about 16 to 32 cells.
• The morula forms before the blastocyst stage in mammalian development.
• Scientists can observe the morula under a microscope during early pregnancy.
• The morula stage typically occurs around day 4 after fertilization.
• Each cell in the morula is called a blastomere.