sedimentary

adjective

sed·​i·​men·​ta·​ry ˌse-də-ˈmen-tə-rē How to pronounce sedimentary (audio)
-ˈmen-trē
1
: of, relating to, or containing sediment
sedimentary deposits
2
: formed by or from deposits of sediment
sedimentary rock

Examples of sedimentary in a Sentence

Recent Examples on the Web
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However, the absence of distinct stratigraphy and the relatively thin sedimentary layer prompted questions about this interpretation. Maria Mocerino, Interesting Engineering, 4 Apr. 2026 The exhibition features ceramics made of clay and soft sedimentary rock by contemporary artist Echo Morgan. Alyson Rodriguez, Dallas Morning News, 19 Mar. 2026 Most of the islands are composed of sedimentary rock, though some are volcanic in origin. Ethan Teekah, Encyclopedia Britannica, 17 Mar. 2026 The landscape first took shape more than 320 million years ago, as wind and rain slowly eroded the forest’s vast sedimentary rock deposits. Erika Ebsworth-Goold, Travel + Leisure, 7 Mar. 2026 See All Example Sentences for sedimentary

Word History

First Known Use

1830, in the meaning defined at sense 1

Time Traveler
The first known use of sedimentary was in 1830

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Cite this Entry

“Sedimentary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sedimentary. Accessed 5 Apr. 2026.

Kids Definition

sedimentary

adjective
sed·​i·​men·​ta·​ry ˌsed-ə-ˈment-ə-rē How to pronounce sedimentary (audio)
-ˈmen-trē
1
: of, relating to, or containing sediment
2
: formed by or from sediment
sedimentary rock
compare igneous, metamorphic

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