Ig'ne-oŭs, a.

a. [Lat. igneus, from ignis, fire, allied to Skr. agni, Lith. ugnis, Slav. ognj; It. & Sp. igneō, Fr. igné.]

1. Pertaining to, or consisting of, fire; as, igneous particles emitted from burning wood; containing fire; having the nature of fire; resembling fire; as, an igneous appearance.
2. (Geol.) Resulting from the action of fire; as, lavas and basalt are igneous rocks. Dana.