de·fal·ca·tion /ˌdiˌfælˈkeʃən, ˌdiˌfɔl, dɪ; ˌdɛfəl-/
  挪用公款,虧空,虧空額
  De·fal·ca·tion n.
  1. A lopping off; a diminution; abatement; deficit. Specifically: Reduction of a claim by deducting a counterclaim; set- off.
  2. That which is lopped off, diminished, or abated.
  3. An abstraction of money, etc., by an officer or agent having it in trust; an embezzlement.
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  defalcation
       n 1: the sum of money that is misappropriated
       2: the fraudulent appropriation of funds or property entrusted
          to your care but actually owned by someone else [syn: embezzlement,
           peculation, misapplication, misappropriation]