tuning fork
noun [ C ] uk/ˈtjuː.nɪŋ ˌfɔːk/ us/ˈtuː.nɪŋ ˌfɔːrk/
（为乐器调音用的）音叉
a metal object with two long, thin parts, joined to a short handle, that, when hit gently, produces a particular note. It is used for tuning musical instruments.
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