Main Entry: ig·ne·ous

Pronunciation: \ˈig-nē-əs\

Function: adjective

Etymology: Latin igneus, from ignis fire; akin to Sanskrit agni fire

Date: 1664

1 : of, relating to, or resembling fire : fiery
2 a : relating to, resulting from, or suggestive of the intrusion or extrusion of magma or volcanic activity b : formed by solidification of magma <igneous rock>