: 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
Examples of perlite in a Sentence
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On top of that, this oil-free formula is also packed with perlite and silica to absorb excess oil and mattify.
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Deanna Pai, Allure, 4 July 2025
Take cuttings from woody herbs, such as rosemary and lavender, and root them in a well-draining medium, like perlite or moist sand.
—Erica Browne Grivas, Better Homes & Gardens, 2 July 2025
Understanding Potting Soil Composition Potting soil is made from a conglomerate of organic matter like peat moss, bark, perlite, and sometimes compost.
—Ashlyn Needham, Southern Living, 25 Apr. 2025
This mix consists of 50% peat moss or coconut coir and 50% vermiculite or perlite.
—Joshua Siskin, Oc Register, 28 June 2025
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Deanna Pai, Allure, 4 July 2025
Take cuttings from woody herbs, such as rosemary and lavender, and root them in a well-draining medium, like perlite or moist sand.
—Erica Browne Grivas, Better Homes & Gardens, 2 July 2025
Understanding Potting Soil Composition Potting soil is made from a conglomerate of organic matter like peat moss, bark, perlite, and sometimes compost.
—Ashlyn Needham, Southern Living, 25 Apr. 2025
This mix consists of 50% peat moss or coconut coir and 50% vermiculite or perlite.
—Joshua Siskin, Oc Register, 28 June 2025
See All Example Sentences for perlite
Cite this Entry
“Perlite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/perlite. Accessed 19 Jul. 2025.
Copy CitationKids Definition
perlite
noun
per·lite
ˈpər-ˌlīt 
: a glassy mineral of volcanic origin that when expanded by heat forms a lightweight material capable of absorbing liquids (as water)
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