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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 in·var /ˈɪnˌvɑr/
 不脹鋼

From: WordNet (r) 2.0

 Invar
      n : an alloy of iron and nickel having a low coefficient of
          thermal expansion; used in tuning forks and measuring
          tapes and other instruments