der·e·lic·tion /ˌdɛrəˈlɪkʃən/
 無主,拋棄物


 Der·e·lic·tion n.
 1. The act of leaving with an intention not to reclaim or resume; an utter forsaking abandonment.
    Cession or dereliction, actual or tacit, of other powers.   --Burke.
 2. A neglect or omission as if by willful abandonment.
    A total dereliction of military duties.   --Sir W. Scott.
 3. The state of being left or abandoned.
 4. Law A retiring of the sea, occasioning a change of high-water mark, whereby land is gained.

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 dereliction
      n 1: a tendency to be negligent and uncaring; "he inherited his
           delinquency from his father"; "his derelictions were not
           really intended as crimes"; "his adolescent protest
           consisted of willful neglect of all his
           responsibilities" [syn: delinquency, willful neglect]
      2: willful negligence