1. Pertaining to, having the nature of, fire; containing fire; resembling fire; as, an igneous appearance.

2. <geology> Resulting from, or produced by, the action of fire; as, lavas and basalt are igneous rocks.

Origin: L. Igneus, fr. Ignis fire; allied to Skr. Agni, Lith. Ugnis, OSlav. Ogne.

(01 Mar 1998)

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