embryo -
an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
blastosphere,
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
gastrula double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm
morula a solid mass of blastomeres that forms when the zygote splits; develops into the blastula
embryo -
(botany) a minute rudimentary plant contained within a seed or an archegonium
embryo -
The beginning; the first stage of anything.
Wikipedia
An embryo is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination. In humans, it is called an embryo until about eight weeks after fertilization (i.e. ten weeks LMP), and from then it is instead called a fetus.
OmegaWiki Dictionary
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embryo An early stage of development in multicellular organisms.
embryo A minute rudimentary plant contained within a seed or an archegonium.
