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From: WordNet (r) 2.0

 Tc
      n 1: a crystalline metallic element not found in nature; occurs
           as one of the fission products of uranium [syn: technetium,
            atomic number 43]
      2: a permanent council of the United Nations that commissions a
         country (or countries) to undertake the administration of
         a territory [syn: Trusteeship Council]