basalt

noun
ba·​salt | \ bə-ˈsȯlt How to pronounce basalt (audio) , ˈbā-ˌsȯlt How to pronounce basalt (audio) \

Definition of basalt

: a dark gray to black dense to fine-grained igneous rock that consists of basic plagioclase, augite, and usually magnetite

Other Words from basalt

basaltic \ bə-​ˈsȯl-​tik How to pronounce basalt (audio) \ adjective

Examples of basalt in a Sentence

Recent Examples on the Web For example, there’s lots of basalt – volcanic rock – in Iceland that reacts with CO2 and turns it into solid carbonates within a few months. Klaus Lackner, The Conversation, 18 Jan. 2022 Made mostly of pH-neutral cement, stainless steel, and basalt, the sculpture provides an artificial reef that encourages coral growth and provides a novel place for marine life to colonize and inhabit while steering tourists away from natural reefs. Ross Kenneth Urken, Travel + Leisure, 8 June 2022 And each house has a trademark Icelandic feature: geothermal basalt stone pools for soaking. Laurie Werner, Forbes, 28 Dec. 2021 The island is a craggy basalt rock that juts up from water so rough that boats cannot dock. New York Times, 9 Apr. 2022 An intricate rendering of Amethyst crystals is followed by a dog with a bubbly body of basalt. Howard Lee, Ars Technica, 7 May 2022 And the basalt — which is volcanic rock — around the plant makes for an ideal geological storage. Ivana Kottasová, CNN, 20 Oct. 2021 Sinkholes in the Yucatán mark the sacred cacao groves of the Maya, and exploding fruits were found under the basalt flows of the Deccan Traps. Rafil Kroll-zaidi, Harper’s Magazine , 27 Apr. 2022 The farm is near a seaside town called Castlerock that is damp to its basalt with the smell of the Atlantic. New York Times, 20 Apr. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'basalt.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of basalt

1601, in the meaning defined above

History and Etymology for basalt

Latin basaltes, manuscript variant of basanites touchstone, from Greek basanitēs (lithos), from basanos touchstone, from Egyptian bḫnw

Learn More About basalt

Dictionary Entries Near basalt

basal rot

basalt

basalt dome

See More Nearby Entries 

Statistics for basalt

Last Updated

6 Aug 2022

Cite this Entry

“Basalt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/basalt. Accessed 8 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on basalt

Nglish: Translation of basalt for Spanish Speakers

Britannica.com: Encyclopedia article about basalt

WORD OF THE DAY

Test Your Vocabulary

Challenging Words You Should Know

  • hedgehog reading a book
  • Often used to describe “the march of time,” what does inexorable mean?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!