(redirected from subducts)
Also found in: Thesaurus, Encyclopedia.


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.


1. (Physiology) the act of subducting, esp of turning the eye downwards
2. (Geological Science) geology the process of one tectonic plate sliding under another, resulting in tensions and faulting in the earth's crust, with earthquakes and volcanic eruptions


(səbˈdʌk ʃən)

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 (subduc′tion zone`) of two plates.
[1965–70; < French subduction (1951); see subduct, -ion]


The sinking of one lithospheric plate’s leading edge below another lithospheric plate. This occurs below deep ocean trenches.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.subduction - a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate
geologic process, geological process - (geology) a natural process whereby geological features are modified
References in periodicals archive ?
To understand plate tectonics, it is necessary for students to concentrate on the subduction zone setting where a dense oceanic plate subducts beneath another plate.
These areas form when one tectonic plate subducts beneath another.
For the Mariana Trench region alone, four times more water subducts than previously calculated.
The earthquakes are explained by the tectonic setting of Central America, the Cocos plate subducts underneath the North American Plate at about 7-8 cm a year, making Mexico a seismically active region.
The Philippine archipelago is sandwiched in between two opposite subduction zones - that of the Eurasian Plate (South China Plate) which subducts (is forced under) Luzon along the Manila Trench and that of the Philippine Sea Plate that subducts toward the west along the East Luzon Trench.
As two massive plates push against each other, one plate subducts, or slides, under the other, pushing material from the crust down into the mantle.
At the latitude of this earthquake, the Cocos plate moves north-northeast with respect to the Caribbean plate at a velocity of approximately 77 mm/yr, and subducts beneath Central America at the Middle America Trench," reported USGS.
As well as showing the path of the trench (dark blue), it also depicts several guyots (yellow), or fiat-topped seamounts, that are being carried into the trench as the Pacific tectonic plate subducts beneath the Mariana plate.
Notably, the Pacific plate subducts below (is pushed underneath) northern Honshu along the Japan trench at a rate of 93 mm/yr., while the Philippine plate subducts beneath southern Honshu along the Nankai trough at a rate of 58 mm/yr.