Term: blastocyst: the blastula of a placental mammal in which some differentiation of cells has occurred
Broader: blastula: early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Unrelated: retractor: surgical instrument that holds back the edges of a surgical incision
Broader: blastula: early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Unrelated: veterinary medicine: the branch of medicine that deals with the diagnosis and treatment of diseases and injuries of animals (especially domestic animals)