igneous rock produced by eruption and solidified on or near the earth's surface; rhyolite or andesite or basalt; "volcanic rock includes the volcanic glass obsidian"
Applies to igneous rocks that cool on the surface of the Earth, including beneath water; typically with small crystals due to the rapidity of cooling Synonym of extrusive Antonym of plutonic
explosively unstable; "a volcanic temper" relating to or produced by or consisting of volcanoes; "volcanic steam"; "volcanic islands such as Iceland"; "a volcanic cone is a conical mountain or hill built up of material from volcanic eruptions
Of, pertaining to, like, or characteristic of a volcano; characterized by or composed of volcanoes; produced, influenced, or changed by a volcano or by volcanic agencies; made of materials derived from volcanoes
relating to or produced by or consisting of volcanoes; "volcanic steam"; "volcanic islands such as Iceland"; "a volcanic cone is a conical mountain or hill built up of material from volcanic eruptions