plural of IGN

(video games) Initialism of in-game name.

plural of ignis fatuus

(dermatology) A skin condition caused by long-term exposure to heat (infrared radiation).

Emitting sparks of fire when struck with steel; scintillating.

A stone that emits sparks of fire when struck with steel.

Pertaining to or having the nature of fire; containing fire; resembling fire. / (geology) Resulting from, or produced by, great heat. With rocks, it could also mean formed from lava or magma.

(geology) one of the major groups of rock that makes up the crust of the Earth; formed by the cooling of molten rock, either below the surface (intrusive) or on the surface (extrusive)

(archaic) Fiery; of or pertaining to fire.

(geology, rare) igneous