diatomaceous

adjective

di·​a·​to·​ma·​ceous ˌdī-ə-tə-ˈmā-shəs How to pronounce diatomaceous (audio)
(ˌ)dī-ˌa-tə-
: consisting of or abounding in diatoms or their siliceous remains
diatomaceous silica

Examples of diatomaceous 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.
Using a diatomaceous dish mat with small feet or one encased in a silicone mesh may also help prevent warping as even just a little bit of elevation allows for airflow under the mat. Emily Farris, Bon Appetit Magazine, 3 June 2025

Word History

First Known Use

1847, in the meaning defined above

Time Traveler
The first known use of diatomaceous was in 1847

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Cite this Entry

“Diatomaceous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diatomaceous. Accessed 18 Jun. 2025.

Medical Definition

diatomaceous

adjective
di·​a·​to·​ma·​ceous ˌdī-ət-ə-ˈmā-shəs How to pronounce diatomaceous (audio) (ˌ)dī-ˌat- How to pronounce diatomaceous (audio)
: consisting of or abounding in diatoms or their siliceous remains
Last Updated: - Updated example sentences
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