DICT.TW Dictionary Taiwan

 sub·duc·tion /(ˌ)səbˈdʌkʃən/
 [地]潛沒(指一個地殼板夫下降到另一個板塊之下的過程)

 Sub·duc·tion n.
 1. The act of subducting or taking away.
 2. Arithmetical subtraction.
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 subduction
      n : a geological process in which one edge of a crustal plate is
          forced sideways and downward into the mantle below
          another plate