ver·​mic·​u·​lite | \ (ˌ)vər-ˈmi-kyə-ˌlīt How to pronounce vermiculite (audio) \

Definition of vermiculite

: any of various micaceous minerals that are hydrous silicates resulting usually from expansion of the granules of mica at high temperatures to give a lightweight highly water-absorbent material

Examples of vermiculite in a Sentence

Recent Examples on the Web Then stick the cut end about two inches deep in containers filled with coarse vermiculite. Tom Maccubbin,, 8 Jan. 2022 Inorganic amendments are perlite, pumice, vermiculite and Utelite. oregonlive, 2 Jan. 2022 The seeds are sown in trays (these should drain) using a seed starting mix typically lightened with vermiculite. Washington Post, 26 Aug. 2020 Stick the cuttings about 2 inches deep into small containers of the soil or vermiculite. Tom Maccubbin,, 12 June 2021 They are made from Portland cement, perlite (or vermiculite) and water. Linda Gandee, cleveland, 6 Sep. 2021 For example, insulation made with vermiculite sometimes has asbestos embedded in it. Star Tribune, 17 July 2021 Easy-to-root coleus can be started in a loose potting soil or container of coarse vermiculite. Tom Maccubbin,, 12 June 2021 The stems should root very easily in containers of potting soil or coarse vermiculite. Tom Maccubbin,, 26 June 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vermiculite.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of vermiculite

1824, in the meaning defined above

History and Etymology for vermiculite

Latin vermiculus "insect larva, grub" (from vermis "worm" + -culus, diminutive suffix) + -ite entry 1 — more at worm entry 1; so called from the worm-like forms taken by such minerals when heated by a blowpipe

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The first known use of vermiculite was in 1824

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Last Updated

14 Jan 2022

Cite this Entry

“Vermiculite.” Dictionary, Merriam-Webster, Accessed 17 Jan. 2022.

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