gastrolith
/ˈgæstrəlɪθ/noun
1
- Zoology a small stone swallowed by a bird, reptile, or fish, to aid digestion in the gizzard【动】（鸟、爬行动物或鱼吞食以帮助在沙囊中消化的）小石块。
2
- Medicine a hard concretion in the stomach【医】胃石。