Also found in: Dictionary, Thesaurus, Legal.
Related to subduction zones: Tectonic plates
subduction zones[səb′dək·shən ‚zōnz]
Regions where portions of the earth's tectonic plates are diving beneath other plates, into the earth's interior. They are defined by deep oceanic trenches, lines of volcanoes parallel to the trenches, and zones of large earthquakes that extend from the trenches landward.