the region below the lithosphere, variously estimated as being from fifty to several hundred miles (eighty-five to several hundred kilometers) thick, in which the rock is less rigid than that above and below but rigid enough to transmit transverse seismic waves.
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
layer of the Earth’s upper mantle, 1914, from Greek asthenos (see asthenia) + sphere.
The upper part of the Earth’s mantle, extending from a depth of about 75 km (46.5 mi) to about 200 km (124 mi). The asthenosphere lies beneath the lithosphere and consists of partially molten rock. Seismic waves passing through this layer are significantly slowed. Isostatic adjustments (the depression or uplift of continents by buoyancy) take place in the asthenosphere, and magma is believed to be generated there. Compare atmosphere, hydrosphere, lithosphere.
asthenospermia asthenospermia as·the·no·sper·mi·a (ās’thə-nō-spûr’mē-ə) n. The loss or reduction of spermatozoan motility.
Pathology. a paroxysmal, often allergic disorder of respiration, characterized by bronchospasm, wheezing, and difficulty in expiration, often accompanied by coughing and a feeling of constriction in the chest. Contemporary Examples And that’s a relatively easy one: I know what an asthma inhaler is, and what it’s used for. Federal Regulations Kill Innovation Too Megan McArdle […]
astap Advanced STatistical Analysis Program
toward or on the side.
noun See ashtanga yoga