asthenosphere

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as·then·o·sphere

 (ăs-thĕn′ə-sfîr′)
n.
A zone of the earth's mantle that lies beneath the lithosphere and consists of several hundred kilometers of deformable rock.

[Greek asthenēs, weak; see asthenia + sphere.]

asthenosphere

(əsˈθiːnəˌsfɪə; -ˈθɛn-)
n
(Geological Science) a thin semifluid layer of the earth (100–200 km thick), below the outer rigid lithosphere, forming part of the mantle and thought to be able to flow vertically and horizontally, enabling sections of lithosphere to subside, rise, and undergo lateral movement. See also isostasy
[C20: from astheno-, from Greek asthenēs weak + sphere]

as•then•o•sphere

(æsˈθɛn əˌsfɪər)

n.
the region below the lithosphere where rock is less rigid than that above and below it.
[1910–15; < Greek asthen(ḗs) frail (see asthenia) + -o- + -sphere]

as·then·o·sphere

(ăs-thĕn′ə-sfîr′)
The upper part of the Earth's mantle. The asthenosphere lies beneath the lithosphere and consists of several hundred miles of partially molten rock. Because it is partially molten, seismic waves passing through this layer have slow velocities. Compare atmosphere, hydrosphere, lithosphere.

asthenosphere

A dense, plastic layer of mantle below the lithosphere.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.asthenosphere - the lower layer of the crustasthenosphere - the lower layer of the crust  
layer - a relatively thin sheetlike expanse or region lying over or under another
crust, Earth's crust - the outer layer of the Earth
Translations
asthénosphère
astenosfera