magma

noun

mag·​ma ˈmag-mə How to pronounce magma (audio)
1
archaic : dregs, sediment
2
: a thin pasty suspension (as of a precipitate in water)
3
: molten rock material within the earth from which igneous rock results by cooling
magmatic adjective

Examples of magma in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
That swelling is a result of rising magma pressing beneath the mountain’s thin surface. Paul Smaglik, Discover Magazine, 28 Jan. 2025 Finally, rising magma will cause explosions from the boiling-temperature geothermal reservoirs. Tommy Tuberville, Newsweek, 8 Jan. 2025 The biggest reservoir of rhyolitic magma found by the team is located in the northeastern area of Yellowstone. Sarah Kuta, Smithsonian Magazine, 6 Jan. 2025 Now, the research team has used numerical modeling to reveal the specific conditions that lead to the enrichment of gold-bearing magmas. David Bressan, Forbes, 25 Dec. 2024 See all Example Sentences for magma 

Word History

Etymology

Middle English, from Latin magmat-, magma, from Greek, thick unguent, from massein to knead — more at mingle

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of magma was in the 15th century

Dictionary Entries Near magma

Cite this Entry

“Magma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magma. Accessed 11 Feb. 2025.

Kids Definition

magma

noun
mag·​ma ˈmag-mə How to pronounce magma (audio)
: molten rock material within the earth
magmatic adjective

Medical Definition

magma

noun
mag·​ma ˈmag-mə How to pronounce magma (audio)
1
: a crude mixture of mineral or organic matter in the state of a thin paste
2
: a suspension of a large amount of precipitated material (as in milk of magnesia) in a small volume of a watery vehicle

More from Merriam-Webster on magma

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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