ossicle       
noun [ C ]  medical specialized uk/ˈɒs.ɪ.kəl/ us/ˈɑːs.ɪ.kəl/
 小骨;骨状的
a small bone or structure that is similar to a bone
  The auditory ossicles are small bones in the middle ear. 听小骨是中耳内的小骨。 
 
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