Definition of asthenosphere
: a zone of a celestial body (such as the earth) which lies beneath the lithosphere and within which the material is believed to yield readily to persistent stresses
asthenosphericplay \-ˌthe-nə-ˈsfir-ik, -ˈsfer-\ adjective
Recent Examples of asthenosphere from the Web
Björn Winker, a mineralogist at the Johann Wolfgang Goethe University in Frankfurt, Germany, believes that the key to the asthenosphere is water.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'asthenosphere'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of asthenosphere
Greek asthenēs weak + English -o- + sphere
First Known Use: 1914
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