igneous

adjective ig·ne·ous \ˈig-nē-əs\

: formed when hot, liquid rock cools and becomes hard

Full Definition of IGNEOUS

: of, relating to, or resembling fire : fiery

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>

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See igneous defined for kids

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

First Known Use: 1664

IGNEOUS Defined for Kids

adjective ig·ne·ous \ˈig-nē-əs\

: formed by hardening of melted mineral material within the earth <igneous rock>

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