stonewort

noun

stone·​wort ˈstōn-ˌwərt How to pronounce stonewort (audio)
-ˌwȯrt
: any of various freshwater green algae (order Charales) that have a thallus differentiated into rhizoids and stems with whorls of branchlets and that are often encrusted with calcareous deposits

Examples of stonewort 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.
Starry stonewort can form dense mats and compete with native plants. Mary Lynn Smith, Star Tribune, 26 June 2021 Starry stonewort was found in Lower Nemahbin Lake and Pewaukee Lake in August, 2019, according to the River Alliance of Wisconsin. Evan Frank, Milwaukee Journal Sentinel, 8 Jan. 2020

Word History

First Known Use

1816, in the meaning defined above

Time Traveler
The first known use of stonewort was in 1816

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Cite this Entry

“Stonewort.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stonewort. Accessed 9 Sep. 2025.

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