BASALT

Pronunciation (US): (GB):

Meaning:

The commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene

Classified under:

Nouns denoting substances

Hypernyms ("basalt" is a kind of...):

volcanic rock (extrusive igneous rock solidified near or on the surface of the Earth)

Meronyms (substance of "basalt"):

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)

Derivation:

basaltic (of or relating to or containing basalt)