n
(oceanography) The abyssal zone.
adj
(geography) Of or belonging to the ocean depths, especially below 2000 metres (6500 ft): abyssal zone.
n
Any fish that lives below a depth of 2000 meters.
n
a large expanse of very flat and smooth ocean floor, usually found at depths of 4,600 to 5,500 meters (15,000 to 18,000 feet).
n
(geography) The oceanic realm consisting of the deep ocean, typified by a dearth of plant life, and plentiful carnivorous animals that are able to withstand extreme pressure.
v
(transitive, geology) to raise the level of a river bed by the deposition of sediment
v
To create or maintain an underwater environment.
adj
Relating to the ocean bottom, between the sublittoral and abyssal zones, at a depth of between 200 and 2000 metres
n
A landscape of the seafloor
n
(geology) A very deep geological zone, typically below a depth of 11 kilometres.
adj
(earth science) Found or occurring below the soil layer.
n
The sea bed, bottom of the ocean.
n
(geology) A network of cracks in limestone rock allowing the infiltration of water and causing sinkholes.
n
(oceanography) Initialism of deep scattering layer. [(oceanography) A layer of the ocean lying usually 300-500 metres deep composed of dense concentrations of pelagic animal life, that moves depending on the time of day, up at night and down during the day. It sometimes appear as if it were the seabed on sonar scopes, due to the density of life in the layer.]
adj
Located on a continental shelf
n
(geomorphology) A geomorphologic unconformity marking a boundary between an upland region and a plane; sometimes marked by a series of waterfalls on rivers that cross it.
n
(oceanography) Synonym of deep scattering layer
adj
(geology) Formed by the joint action of a river and the sea.
adj
Of or relating to the deepest parts of the ocean.
n
A hard seafloor, typically a layer of sand covering rock.
n
(geology) A lithified seafloor.
n
That part of the Earth, or other planet, that lies below the surface of its lakes, seas and oceans,
n
Lead sourced from ancient shipwrecks, where the deep sea environment has kept it from accumulating radiation from outside sources, and where inherent radiation has decayed away in the time it has been sunk.
n
(Christianity) A luna: a crescent-shaped receptacle, often glass, for holding the (consecrated) host (the bread of communion) upright when exposed in the monstrance.
n
an underwater shoal (bank) in the South China Sea
n
(Shetland) Phosphorescence on the ocean.
n
(oceanography) A submarine trench in the North Pacific Ocean, noted for having the deepest known point on Earth.
n
The hard bacterial seafloor of the Proterozoic era.
n
A mid-ocean ridge: a submarine volcanic mountain range.
adj
Of, pertaining to, or adapted for swimming.
n
Synonym of seabed and seafloor, especially used for that of an ocean.
n
(countable and uncountable) The ocean floor, the bed of the ocean.
n
(oceanography) A long steep-sided depression in the ocean floor.
adj
Spanning the whole ocean
n
the bottom of the sea, seabed
n
The floor or bottom of the sea or ocean.
n
The bottom of a sea or ocean.
n
A deep in Mariana Trench, Pacific Ocean; the third deepest known place on Earth, second deepest in the Mariana Trench.
n
Alternative form of sofar channel [(hydrology, physics, nautical) The depth in the oceans, usually around 750 m below the surface, where the speed of sound is the lowest, causing it to transmit sound waves generated within this channel for long distances with little attenuation by acting as a waveguide.]
n
A soft seafloor, typically composed of muddy sediment.
v
(transitive) To form into a splayed-out shape, like that of a starfish.
adj
Alternative form of subaqueous. [Existing below the water surface.]
adj
Alternative spelling of subsurface [below the surface]
adj
(geology) Formed, located or occurring on the Earth's land surface; contrasted with subaqueous
adj
Located or living under water; submarine.
adj
Existing below the water surface.
adv
Taking place underwater.
adj
Obsolete spelling of subaqueous [Existing below the water surface.]
adj
beneath (and therefore older than) a contemporaneous layer or site
adj
(geology) Located or occurring beneath continental crust.
adj
(geology) Underneath the crust (of the Earth)
adj
(rare) Located or occurring under the surface of a lake.
adj
Below the surface (and especially near the bottom) of a lake
adj
(geology) Beneath a limnic stratum
adj
(geology) Below (deeper than) the lithosphere
adj
Situated beneath the Moon.
adj
underwater; submerged; aquatic
adj
(botany) Growing entirely under water.
adj
Located beneath a mountain
adj
Beneath a floating layer of solid or of a less-dense liquid.
adj
Situated under the clouds.
adj
Beneath the surface of the ocean.
n
(often attributive) The non-frozen ground below the permafrost
adj
Beneath the photic zone
adj
Situated below the poles
adj
Below an area being investigated by radar.
adj
Lying beneath a layer of salt.
n
The layer of earth that is below the topsoil.
adj
Below the surface; subsurface.
adj
Beneath Tartarus; infernal.
adj
Obsolete form of subterranean. [Below ground, under the earth, underground.]
adj
Under the earth; subterranean.
n
(less common) Any ocean larger than the current Pacific Ocean.
adj
Lying below a floating solid
adj
(geology, of a volcanic eruption) that takes place in shallow seas or lakes
n
(planetology) complex-ridged surface feature seen on plateau highlands of Venus and perhaps on Triton
adj
Existing, relating to, or made for use beneath the sea.
adj
(not comparable) Beneath the surface of the water; of or pertaining to the region beneath the water surface.
adj
Of or pertaining to water beneath the surface of the earth which is located above the level of the permanent groundwater.
n
(geology) A deep-level seismic zone on the line of subduction. This zone can be as deep as 700km.
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