flowstone

noun

flow·​stone ˈflō-ˌstōn How to pronounce flowstone (audio)
: calcite deposited by a thin sheet of flowing water usually along the walls or floor of a cave

Examples of flowstone in a Sentence

Recent Examples on the Web
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The park is best known for its extensive limestone cave system with stalactites, stalagmites and flowstones. Olivia Rose, AZCentral.com, 21 Aug. 2025 Inside, explore stalactites, stalagmites, flowstones, and helictites. Erin Gifford, USA Today, 18 June 2025 The constantly evolving and changing cave system also includes various mineral formations, including stalactites, stalagmites, flowstones, and helictites. Evie Carrick, Travel + Leisure, 6 Dec. 2024 Here, too, flowing water had deposited a flowstone over the layer of sediment in which these shells were found. Jennifer Ouellette, Ars Technica, 21 June 2023 However, rocks from different ages have fallen into the cave, along with water and flowstone deposits that mix younger sediment with older sediment. Monica Cull, Discover Magazine, 27 June 2022

Word History

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of flowstone was in 1925

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Cite this Entry

“Flowstone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flowstone. Accessed 10 Sep. 2025.

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