| 单词 | koilonychia | 
| 释义 | koilonychia in American English (ˌkɔilouˈnɪkiə) noun Medicine  an abnormal condition in which the outer surfaces of the nails are concave; spoon nail Word origin[1900–05; ‹ Gk koîl(os) hollow + onych- (s. of ónyx nail;   see onyx) + -ia] Examples of 'koilonychia' in a sentence | 
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