👉 Unembryonic is a medical term that refers to any embryo or fetus, which is not yet fully formed and has not yet developed its organs and tissues. It is often used in medicine to refer to embryos or fetuses that are still developing but not yet viable for birth. Unembryonic embryos are typically derived from a fertilized egg after it has been implanted outside the uterus and have not yet reached the stage of implantation where they are able to develop into a fetus.