Basalt Definition

bə-sôlt, bāsôlt
basalts
noun
A hard, dense, dark igneous rock composed chiefly of plagioclase feldspar, pyroxene, and olivine, and often having a glassy appearance.
American Heritage
A dark, fine-grained, usually extrusive igneous rock that is more basic than andesite, consisting chiefly of plagioclase feldspars and pyroxene: often found in vast sheets, it is the most common extrusive igneous rock.
Webster's New World
A kind of hard unglazed pottery.
American Heritage
A kind of unglazed, black pottery designed by Josiah Wedgwood.
Webster's New World

(mineralogy) A hard mafic igneous rock of varied mineral content; volcanic in origin, it makes up much of the Earth's oceanic crust.

Wiktionary
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other
A dark, fine-grained, igneous rock consisting mostly of plagioclase feldspar and pyroxene, and sometimes olivine. Basalt makes up most of the ocean floor and is the most common type of lava. It sometimes cools into characteristic hexagonal columns, as in the Giant's Causeway in Anterim, Northern Island. It is the fine-grained equivalent of gabbro.
American Heritage Science

Other Word Forms of Basalt

Noun

Singular:
basalt
Plural:
basalts

Origin of Basalt

  • From Late Latin basaltes, a misspelling of Latin basanites, from Ancient Greek βασανίτης (basanitēs), from βάσανος (basanos, “touchstone”), from Egyptian

    From Wiktionary

  • Latin basaltēs alteration of basanītēs touchstone from Greek basanītēs (lithos) from basanos Egyptian bḫn graywacke

    From American Heritage Dictionary of the English Language, 5th Edition

  • bawḥan 'slate'.

    From Wiktionary

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