basalt

Noun
  1. The commonest type of solidified lava;
    A dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene (synset 114797183)
    is a type of: volcanic rock - extrusive igneous rock solidified near or on the surface of the Earth
    substance holonym:
    • pyroxene - any of a group of crystalline silicate mineral common in igneous and metamorphic rocks
    • oligoclase, plagioclase - any of a series of triclinic feldspars that form rocks

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