| 释义 |
pre-embryo
pre-em·bry·o (prē-ĕm′brē-ō′)n. pl. pre-em·bry·os A fertilized ovum up to 14 days old, before it becomes implanted in the uterus.
pre-em′bry·on′ic (-ŏn′ĭk) adj.pre-embryo (priːˈɛmbrɪəʊ) n (Biology) the structure formed after fertilization of an ovum but before differentiation of embryonic tissue
pre-embryo
pre-embryo (prē-ĕm′brē-ō′)n. pl. pre-embry·os A fertilized ovum up to 14 days old, before it becomes implanted in the uterus.
pre-em′bry·on′ic (-ŏn′ĭk) adj.pre-embryo (prē″ ĕm′ brē-ō) The morula and blastocyst stages produced by the division of the zygote until the formation of the embryo proper at the appearance of the primitive streak about 14 days after fertilization. |