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nounthe commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxenetype of:
Definition that contains basalt
- volcanic igneous rock produced by eruption and solidified on or near the earth's surface; rhyolite or andesite or basalt
- basaltic of or relating to or containing basalt
- whinstone any of various hard colored rocks (especially rocks consisting of chert or basalt)
- fingal's cave a large cave with basaltic pillars on Staffa island in Scotland
- tachylite a basic or basalt glass
- whin any of various hard colored rocks (especially rocks consisting of chert or basalt)
- aphanite fine-grained homogeneous rock (such as basalt) containing minerals undetectable by the naked eye