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2 definitions found

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

 AC
 鑑別碼

From: WordNet (r) 2.0

 Ac
      n 1: a radioactive element of the actinide series; found in
           uranium ores [syn: actinium, atomic number 89]
      2: an electric current that reverses direction sinusoidally;
         "In the US most household current is AC at 60 cycles per
         second" [syn: alternating current] [ant: direct current]