1. Adjective.  Pertaining to, having the nature of fire; containing fire; resembling fire; as, an '''igneous''' appearance.
  2. Adjective.  (geology) Resulting from, or produced by, the action of great heat; with rocks, it could also mean formed from lava/magma; as, granite and basalt are '''igneous''' rocks.

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