臀位 túnwèi breech presentation Origin Definitions Defs Strokes Stroke Words Sentences Sents 臀位分娩 túnwèifēnmiǎn breech delivery the delivery of a baby in which the buttocks or feet are presented first臀位取胎术 túnwèiqǔtāishù breech extraction the medical procedure of extracting a fetus during a breech birth