Definition from Wiktionary, the free dictionary
igneous (not comparable)
- Pertaining to or having the nature of fire; containing fire; resembling fire.
- The stone had an igneous appearance.
- (geology) Resulting from, or produced by, great heat. With rocks, it could also mean formed from lava or magma.
- Granite and basalt are igneous rocks.
pertaining to, having the nature of fire
resulting from, or produced by, the action of great heat