NOUN
- 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
How To Use blastosphere In A Sentence
- PROTOZOA, the blastosphere by some rare forms, and the gastrula in the essential structure of the COELENTERATES, -- the subkingdom to which the fresh-water hydra and the corals belong. The Elements of Geology
- The blastosphere of the frog is like what the blastosphere of amphioxus would be, if the future hypoblast cells were enormously larger through their protoplasm being diluted with yolk. Text Book of Biology, Part 1: Vertebrata
