Igneous rock is rock formed by solidification from a molten state; especially from molten magma. Igneous fusion is fusion by heat alone. Pyrogenic strata.
source: WordNet 3.0
produced by the action of fire or intense heat
Rocks formed by igneous agents.
source: WordNet 3.0
Pertaining to, having the nature of, fire; containing fire; resembling fire; as, an igneous appearance.
source: Webster 1913
adjective satellite
like or suggestive of fire
A fiery desert wind. An igneous desert atmosphere.