| 单词 | blastula |
| 释义 | blastula —blastular, adj. —blastulation /blas'cheuh lay"sheuhn/, n. /blas"cheuh leuh/, n. , pl. blastulas, blastulae /-lee'/. Embryol. the early developmental stage of an animal, following the morula stage and consisting of a single, spherical layer of cells enclosing a hollow, central cavity. Cf. blastocyst. [1885-90; < NL < Gk blast(ós) bud, sprout + NL -ula -ULE] |
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