pyrosphere

Noun. (geology, dated) The zone of igneous activity and lava formation, situated between the lithosphere and barysphere.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.