[suh
b-duhk-shuhn] 
| 1. | an act or instance of subducting; subtraction or withdrawal. |
| 2. | Geology. the process by which collision of the earth's crustal plates results in one plate's being drawn down or overridden by another, localized along the juncture (subduction zone) of two plates. |
| sub·duc·tion (səb-dŭk'shən) n. A geologic process in which one edge of one crustal plate is forced below the edge of another. [French, from Latin subductus, past participle of subdūcere, to draw away from below : sub-, sub- + dūcere, to lead; see deuk- in Indo-European roots.] sub·duct' v., sub·duc'tal (-təl) adj. |