a process of pulling something down; esp.,
- the muscular action needed to aim an eye downward
- Geol. the sinking of one crustal plate under another as they collide
A geologic process in which one edge of one crustal plate is forced below the edge of another.
Origin of subductionFrench, from Latin subductus, past participle of subd&umacron;cere, to draw away from below : sub-, sub- + d&umacron;cere, to lead; see deuk- in Indo-European roots.