embryology

n. branch of biology dealing with embryonic formation and development

Embryology is the study of the development of an embryo. An embryo is defined as any vertebrate in a stage before birth or hatching. Embryology refers to the development of the egg cell (zygote) after fertilization and the differentiation of cells into tissues and organs. This covers development including the formation of primitive organ systems, the creation of fundamental tissues, and cleavage. In humans the term embryo refers to the ball of dividing cells from the moment the blastocyst is implanted until the end of the eighth week after conception. Past the eighth week, the developing human is called a fetus.
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Embryology /em·bry·ol·o·gy/ the science of the origin and development of the individual from fertilization of an oocyte to the end of the eighth [more]Embryology - Community and Resources

Noun
1. the branch of biology that studies the formation and early development of living organisms
(hypernym) biology, biological science
(hyponym) teratology
(class) germ layer

(n.)
The science which relates to the formation and development of the embryo in animals and plants; a study of the gradual development of the ovum until it reaches the adult stage.