magma

noun

mag·​ma ˈmag-mə 

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

mag-ˈma-tik 

adjective

Examples of magma in a Sentence

Recent Examples on the Web

The seawater gets heated by the magma, which sends it shooting back up into the deep ocean, along with a wealth of life-sustaining minerals that support a whole ecosystem of organisms in proximity to the vents. —Margherita Bassi, Smithsonian Magazine, 23 Oct. 2024

There, it was reheated by hot magma and jetted upward through openings that scientists named hydrothermal vents. —Suzanne Oconnell, The Conversation, 3 Sep. 2024

This week’s free dragon giveaway will surely be season two’s apotheosis, an exhilarating pastiche of Jurassic Park and that scene in Congo where the bad gorillas jump into liquid hot magma. —Amanda Whiting, Vulture, 28 July 2024

This opens the door for new sources of these elements, especially since iron-rich magma is easily identifiable. —Devika Rao, theweek, 1 Oct. 2024

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

Kids Definition

magma

noun

mag·​ma ˈmag-mə 

: molten rock material within the earth

magmatic

mag-ˈmat-ik 

adjective

Medical Definition

magma

noun

mag·​ma ˈmag-mə 

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