a mass of undifferentiated cells from which an organ or body part develops
例句
It seemed, therefore, that all scientists needed to do was figure out how to induce an amputated limb to form a blastema.因此科学家的目标，就是找出如何诱导断肢形成芽基的方法。
They found that salamander regeneration begins when a clump of cells called a blastema forms at the tip of a lost limb.他们发现，蝾螈再生是从一团被称为芽基的细胞在断肢顶端形成的时候开始的。
