gas.tro.lith

n.（名詞）
A pathological stony mass formed in the stomach; gastric calculus.
胃石：形成于胃中的結(jié)石塊；胃結(jié)石
A small stone found in the stomach of some reptiles, fish, and birds that aids in digestion by helping grind ingested food material.
胃石：一種小石頭，常發(fā)現(xiàn)于某些爬蟲(chóng)、魚(yú)和鳥(niǎo)的胃中，通過(guò)幫助碾磨食物來(lái)幫助消化