Yahoo奇摩字典 網頁搜尋

搜尋結果

1. Oxford Dictionary

   trophoblast

   • IPA[ˈtrɒfəblɑːst]

   英式

   • n.
     a layer of tissue on the outside of a mammalian blastula, supplying the embryo with nourishment and later forming the major part of the placenta.

   • noun: trophoblast, plural noun: trophoblasts