basalt

[ buh-sawlt, bas-awlt, bey-sawlt ]
/ bəˈsɔlt, ˈbæs ɔlt, ˈbeɪ sɔlt /

noun

the dark, dense igneous rock of a lava flow or minor intrusion, composed essentially of labradorite and pyroxene and often displaying a columnar structure.

Origin of basalt

1595–1605; < Latin basaltēs, a misreading, in manuscripts of Pliny, of basanītēs < Greek basanī́tēs ( líthos) touchstone, equivalent to básan(os) touchstone (ultimately < Egyptian bh̬n(w) graywacke) + -ītēs -ite1

OTHER WORDS FROM basalt

ba·sal·tic, ba·sal·tine [buh-sawl-tin, -tahyn] /bəˈsɔl tɪn, -taɪn/, adjective sub·ba·sal·tic, adjective

Example sentences from the Web for basaltic

British Dictionary definitions for basaltic

basalt
/ (ˈbæsɔːlt) /

noun

a fine-grained dark basic igneous rock consisting of plagioclase feldspar, a pyroxene, and olivine: the most common volcanic rock and usually extrusive See flood basalt
a form of black unglazed pottery resembling basalt

Derived forms of basalt

basaltic, adjective

Word Origin for basalt

C18: from Late Latin basaltēs, variant of basanītēs, from Greek basanitēs touchstone, from basanos, of Egyptian origin

Scientific definitions for basaltic

basalt
[ bə-sôlt, bāsôlt′ ]

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.

Cultural definitions for basaltic

basalt
[ (buh-sawlt, bay-sawlt) ]

A hard, dense igneous rock that makes up much of the material in tectonic plates. The part of the Earth's crust beneath the oceans consists mainly of basalt whereas continental crust consists mainly of less dense rocks, such as granite. (See plate tectonics.)