crepitus
/ˈkrepɪtəs/noun
mass noun
1- Medicine a grating sound or sensation produced by friction between bone and cartilage or the fractured parts of a bone【医】（骨与软骨间或骨与骨头骨折部分间摩擦发生的）捻发音, 咿轧音。
1.1
- the production of crepitations in the lungs; rale（肺部的）捻发音（或咿轧音）的产生; 啰音。
词源
early 19th cent.:from Latin, from crepare 'rattle'.