molten

adjective

mol·​ten ˈmōl-tᵊn How to pronounce molten (audio)
Synonyms of moltennext
1
: fused or liquefied by heat : melted
molten lava
2
: having warmth or brilliance : glowing
… the molten sunlight of warm skies …T. B. Costain
3
obsolete : made by melting and casting

Examples of molten in a Sentence

Recent Examples on the Web
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Heat from the reactor is carried by a secondary sodium loop to intermediate heat exchangers, which then transfer energy to a molten-salt loop connected to thermal storage tanks. David Szondy march 08, New Atlas, 8 Mar. 2026 The project recently received air turbine units, generators, electric motors, molten salt storage tanks, and other core equipment from Shanghai Electric. Prabhat Ranjan Mishra, Interesting Engineering, 6 Mar. 2026 Once separated, and still molten, the waste was poured on the ground like lava. Sarah Henry, AZCentral.com, 1 Mar. 2026 That interpretation implied the young moon once hosted a vigorous internal dynamo — a molten, convecting core capable of generating a global magnetic field, much like Earth’s today. Stefanie Waldek, Space.com, 27 Feb. 2026 See All Example Sentences for molten

Word History

Etymology

Middle English, from past participle of melten to melt

First Known Use

14th century, in the meaning defined at sense 3

Time Traveler
The first known use of molten was in the 14th century

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Cite this Entry

“Molten.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/molten. Accessed 14 Mar. 2026.

Kids Definition

molten

adjective
mol·​ten ˈmōlt-ᵊn How to pronounce molten (audio)
: melted especially by very great heat

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