ballottement

a palpatory technique for feeling a floating object in the body (especially for determining the position of a fetus by feeling the rebound of the fetus after a quick digital tap on the wall of the uterus)

体内の浮遊物を触知する触診法（特に子宮壁を指先で素早く叩いた後の胎児の跳ね返りを感じて胎児の位置を特定する方法）