igneous
adjective
1. produced under conditions involving intense heat
- igneous rock is rock formed by solidification from a molten state; especially from molten magma
- igneous fusion is fusion by heat alone
Similar word(s): pyrogenic, pyrogenous
2. produced by the action of fire or intense heat
- rocks formed by igneous agents
Similar word(s): eruptive
3. like or suggestive of fire
- an igneous desert atmosphere