Noun, pl., embryologies
1. Branch of biology that deals with the study of the development of embryo (from fecundation to birth). (dictionary.com)
2. The scientific study of embryos. (wiktionary.com)
3. The study of the embryo and its development from a single-celled zygote (fertilized ovum) to the establishment of form and shape (at which point, if it is an animal, it becomes a foetus). a subfield of developmental biology. The branch of biology that studies the formation and early development of living organisms. The study of embryos and related factors. (biology-online.org)
4. The science of the development of an embryo from the fertilization of the ovum to the fetus stage. (wikipedia.com)
Word origin: From Greek ἔμβρυον, embryon, the unborn, embryo + -λογία, –logia, study of