igneous

The definition of igneous is something produced by volcanic action or intense fire.

(adjective)

Rocks that have formed from solidified lava from a volcano are an example of rocks that would be described as igneous.

See igneous in Webster's New World College Dictionary

adjective

of, containing, or having the nature of, fire; fiery
produced by the action of fire; specif., formed by volcanic action or intense heat, as intrusive or extrusive rock solidified from molten magma or lava

Origin: L igneus < ignis, a fire < IE base *egnis > Sans agníḥ, fire, Lith ugnìs

See igneous in American Heritage Dictionary 4

adjective

Of, relating to, or characteristic of fire.
Geology
a. Formed by solidification from a molten state. Used of rocks.
b. Of or relating to rock so formed; pyrogenic.

Origin:

Origin: From Latin igneus

Origin: , from ignis, fire

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