(Geology)(of rock) having solidified from lava or magma (地质)(岩石)火成的 ■relating to or involving volcanic or plutonic processes (与)火山爆发(有关)的;(与)火成(有关)的 igneous activity. 火山活动。 ■(rare)of fire; fiery (罕)火的
语源
mid 17th cent.: from Latin igneus (from ignis 'fire') + -ous