subduction Meaning, Definition & Usage

  1. noun a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate

WordNet

Sub*duc"tion noun
Etymology
L. subductio.
Definitions
  1. The act of subducting or taking away. Bp. Hall.
  2. Arithmetical subtraction. Sir M. Hale.

Webster 1913