noun
volcanic island
Refers to an island formed by volcanic activity. Used in geography and everyday contexts.
ハワイは火山島です。
Hawaii is a volcanic island.
この火山島は約100万年前にできた。
This volcanic island was formed about one million years ago.
島 is the general word for 'island'; 火山島 specifies the type of island.
Compound of 火山 (かざん, 'volcano') and 島 (とう, 'island').