羊膜穿刺 yángmóchuāncì amniocentesis Origin Definitions Defs Strokes Stroke Words Sentences Sents 羊膜 yángmó amnion the innermost membrane that encloses the embryo of a mammal, bird, or reptile穿刺 chuāncì puncture to puncture a body cavity, organ, or vessel with a needle to extract fluid or tissue for diagnosis or treatment; to perform a biopsy