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pyrosphere
noun
py·ro·sphere
\-ˌsfi(ə)r\
Definition of pyrosphere
1 : the hot central portion of the earth
2 : a hypothetical spherical zone of molten magma that is held to intervene between the crust of the earth and a solid nucleus and to supply lava to volcanoes
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Origin and Etymology of pyrosphere
International Scientific Vocabulary pyr- + sphere
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