The term epiblast typically refers to a layer of cells that develops during embryonic development. Synonyms for this word might include terms related to embryonic development, such as embryoblast or germinal disc. Other synonyms might be anatomical terms that specifically refer to the epiblast layer itself, such as the ectoderm or the ectoblast. These terms all have slightly different meanings and uses depending on the context in which they are used, but they all relate to the same early stage of embryonic development and the important role that the epiblast layer plays in this process.