名词白垩块，痛风石; 垩石
1. 白恶石：chalk 粉笔 | chalkstone 白恶石 | chamber 室
2. 白垩块：chalkrail 粉笔槽 | chalkstone 白垩块 | chalkware 彩饰
3. 白垩：chalk 白垩 | chalkstone 白垩 | chalky soil 白垩土
4. 痛风石：痛风结节tophus | 痛风石chalkstone | 痛风素质goutiness
noun
1. a deposit of urates around a joint or in the external ear
diagnostic of advanced or chronic gout
Synonym: tophus