[地]潛沒(指一個地殼板夫下降到另一個板塊之下的過程)
Subduction \Sub*duc"tion\, n. [L. subductio.] 1. The act of subducting or taking away. --Bp. Hall. 2. Arithmetical subtraction. --Sir M. Hale.
subduction n : a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate