an abnormality during pregnancy; chorionic villi around the fetus degenerate and form clusters of fluid-filled sacs; usually associated with the death of the fetus
双语例句
The grape-like villi of a hydatidiform mole are seen here. 图示的是葡萄胎由类似于葡萄状的绒毛状物构成。
Half of choriocarcinomas arise in preceding hydatidiform moles. 一半的绒毛膜癌发生于葡萄胎后。
