igneous
adjective /ˈɪɡniəs/
/ˈɪɡniəs/
(geology)- (of rocks) formed when magma (= melted or liquid material lying below the earth’s surface) becomes solid, especially after it has poured out of a volcanoOxford Collocations DictionaryIgneous is used with these nouns:
- rock
Word Originmid 17th cent.: from Latin igneus (from ignis ‘fire’) + -ous.