Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A natural volcanic glass similar to obsidian but having distinctive concentric cracks and a relatively high water content. In a fluffy heat-expanded form perlite is used as a lightweight aggregate, in fire-resistant insulation, and in soil for potted plants.
from The Century Dictionary.
- noun A peculiar form of certain vitreous rocks, such as obsidian and pitch-stone, the mass of which sometimes assumes the form of enamel-like globules.
- noun See
pearlite .
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) Same as
pearlite .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy An amorphous
volcanic glass formed by the hydration ofobsidian - noun The lightweight insulating material and
aggregate resulting from expanding the glass by heat.
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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The name perlite (also spelled pearlite) comes from the French word perle which means pearl, in reference to the “pearly” luster of classic perlite.
Perlite 2008
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The name perlite (also spelled pearlite) comes from the French word perle which means pearl, in reference to the "pearly" luster of classic perlite.
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A: Most potting soil or seed-starting media that you purchase in a garden center is pasteurized and contains inert material, such as vermiculite or perlite, which is sterile.
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A: Most potting soil or seed-starting media that you purchase in a garden center is pasteurized and contains inert material, such as vermiculite or perlite, which is sterile.
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The company has argued the contract changes to boost efficiency and productivity were necessary given the lower demand for perlite, which is used for liquid solid separations and in fillers for paints, coatings, polymers and elastomers.
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Lightweight Aggregate, such as perlite or vermiculite, can be added for special applications requiring overall weight reduction, additional thermal insulation or sound absorption.
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But "perlite" or not, there can be no question of the astounding stupidity of the West Indian rank and file, a stupidity amusing if you are in an amusable mood, unendurable if you neglect to pack your patience among your bag of supplies in the morning.
Zone Policeman 88; a close range study of the Panama canal and its workers Harry Alverson Franck 1921
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Strip off the lower leaves and stick the stem into moist, soil-less mix, such as perlite and-or vermiculite.
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Even plants that usually grow on dry land—in soil—can be grown with their roots in a mineral-nutrient solution or in an inert medium, such as perlite, gravel, or something called mineral wool—fibers made from minerals or metal oxides.
MY EMPIRE OF DIRT Manny Howard 2010
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Even plants that usually grow on dry land—in soil—can be grown with their roots in a mineral-nutrient solution or in an inert medium, such as perlite, gravel, or something called mineral wool—fibers made from minerals or metal oxides.
MY EMPIRE OF DIRT Manny Howard 2010
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