asthenosphere
/æsˈθenəsfɪə(r)/noun
- Geology the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur【地质】软流圈。
派生词
asthenospheric
adjective词源
early 20th cent.: from Greek asthenēs 'weak' + SPHERE.