| 单词 | conceptus |
| 释义 | conceptus (once / 223006 pages) n WORD FAMILY conceptus USAGE EXAMPLESIf a conceptus has only a single chromosome—a Y—it probably fails to implant in the uterus and never develops. Scientific American(Jul 27, 2013) Normally, when a sperm fertilizes an egg, the resulting human conceptus has 23 pairs of chromosomes. Scientific American(Jul 26, 2013) Bayer said it would pay $31.00 a share in cash for Conceptus - a 20% premium to the price at the end of last week. BBC(Apr 29, 2013) 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 Syn|Hypo|Hyper embryo, fertilized egg 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 gastruladouble-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 morulaa solid mass of blastomeres that forms when the zygote splits; develops into the blastula blastocyst, blastodermic vessiclethe blastula of a placental mammal in which some differentiation of cells has occurred animal, animate being, beast, brute, creature, fauna a living organism characterized by voluntary movement |
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