Embrionis

Embrionis is a term that has seen some limited use in scientific and sometimes fictional contexts to refer to the early stages of development of an organism. It is not a widely recognized or formally defined scientific term in the same way that "embryo" or "fetus" are. When the term has been employed, it generally describes the initial, undifferentiated cellular mass or the very first phase of development following fertilization.

The concept behind embrionis might encompass the period from the zygote stage, where the egg and sperm fuse, through the early cleavage divisions and the formation of a blastocyst. In some theoretical discussions or speculative fiction, "embrionis" could be used to denote a nascent, unformed life that is not yet clearly an embryo but possesses the potential for future development. Its usage is often imprecise and may depend heavily on the specific context in which it appears, lacking the standardized biological definition associated with established developmental stages. Researchers and scientists typically rely on terms like zygote, morula, blastocyst, embryo, and fetus to describe distinct phases of development with specific biological characteristics.