Definition of Igneous

Adjective: igneous ig-nee-us

Produced under conditions involving intense heat
"igneous rock is rock formed by solidification from a molten state; especially from molten magma";
- pyrogenic, pyrogenous
(geology) produced by the action of fire or intense heat
"rocks formed by igneous agents";
- eruptive
Like or suggestive of fire
"an igneous desert atmosphere";
- fiery