conceptus

Definitions of conceptus
1

n 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

Synonyms:
embryo, fertilized egg
Types:
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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
blastocyst, blastodermic vessicle
the blastula of a placental mammal in which some differentiation of cells has occurred
Type of:
animal, animate being, beast, brute, creature, fauna
a living organism characterized by voluntary movement

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