听小骨

tīng xiǎo gǔtingxiaogu

1. ossicles (of the middle ear)
2. three ossicles, acting as levers to amplify sound, namely: stapes or stirrup bone 鐙骨|镫骨, incus or anvil bone 砧骨, malleus or hammer bone 錘骨|锤骨

Study it in Yanamino