[as.theno.sphere] n [Gk asthenes weak + E -o- + sphere] (1914): a hypothetical zone of a celestial body (as the earth) which lies beneath the lithosphere and within which the material is believed to yield readily to persistent stresses -- as.theno.spher.ic adj
ASTHENOSPHERE
Meaning of ASTHENOSPHERE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012