Read the dictionary definition of igneous. All definitions for this word.
1. like or suggestive of fire
1. a fiery desert wind
2. an igneous desert atmosphere
2. produced by the action of fire or intense heat
1. rocks formed by igneous agents
3. produced under conditions involving intense heat
1. igneous rock is rock formed by solidification from a molten state; especially from molten magma
2. igneous fusion is fusion by heat alone
3. pyrogenic strata