| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024as•then•o•sphere (as then′ə sfēr′),USA pronunciation n. [Geol.]- Geologythe 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.
- Greek asthen(é̄s) frail (see asthenia) + -o- + -sphere
- 1910–15
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