per·​lite | \ˈpər-ˌlīt \

Definition of perlite 

: volcanic glass that has a concentric structure, appears as if composed of concretions, is usually grayish and sometimes spherulitic, and when heated expands to form a lightweight aggregate used especially in concrete and plaster and as a medium for potting plants

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Other Words from perlite

perlitic \ ˌpər-​ˈli-​tik \ adjective

Examples of perlite in a Sentence

Recent Examples on the Web

Place the seeds on wet blotting paper or mix them with a little damp peat moss and perlite; store in the refrigerator for 5 days before sowing. The Editors Of Organic Life, Good Housekeeping, "How To Grow Nutritious Lettuce Greens All Year Long," 15 June 2017 Concrete mixed with vermiculite or perlite, or concrete and fiberglass blends, are much lighter. The Editors Of Organic Life, Good Housekeeping, "Everything You Need To Know About Container Gardening," 1 June 2017 Load your pot with a sterile potting mix, or try this one from V. J. Billings, owner of Mountain Valley Growers organic nursery: Mix approximately 60 percent peat moss with 40 percent perlite, with a couple of handfuls of homemade compost thrown in. Therese Ciesinski, Good Housekeeping, "How To Grow Lavender Anywhere," 3 Apr. 2017 Raposo uses a custom mix of one-third lava rocks, one-third perlite and one-third wood chips. Karen Dardick,, "Bromeliads create garden drama," 17 May 2018 Buy a commercial planting mix or make your own from equal parts of compost, pulverized pine or fir bark, and perlite or vermiculite. The Editors Of Organic Life, Good Housekeeping, "Everything You Need To Know About Container Gardening," 1 June 2017 Potting soil typically consists of a mix of organic matter, peat moss and perlite. Adrian Higgins, sacbee, "Container culture – these pots do lots | The Sacramento Bee," 11 May 2018 Rebecca Needles, IBG events operations manager, will show you how to create your own trough using a cement, perlite and peat moss mixture. idahostatesman, "Learn about small landscapes at Idaho Botanical Garden classes," 6 July 2017 Use good compost with some sand or perlite added for drainage. Jeff Lowenfels, Alaska Dispatch News, "Planning to bring some of your outdoor plants inside? Now’s the time to start prepping them," 18 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'perlite.' 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 perlite

1833, in the meaning defined above

History and Etymology for perlite

French, from perle pearl

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Time Traveler for perlite

The first known use of perlite was in 1833

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