1) Greenhouse soil additive 2) Industrial mineral 3) Lustrous volcanic rock 4) Plant growth medium
Found on
https://www.crosswordclues.com/clue/perlite
Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of Obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently. It is an industrial mineral and a commercial product useful for its light weight after processing. ==Properties== Perlite sof...
Found on
http://en.wikipedia.org/wiki/Perlite
• (n.) Same as Pearlite.
Found on
http://thinkexist.com/dictionary/meaning/perlite/
Lightweight volcanic material often used in soil less media.
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http://urbanext.illinois.edu/veggies/glossary.cfm
a natural glass with concentric cracks such that the rock breaks into small, pearllike bodies. It is formed by the rapid cooling of viscous lava or ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/p/45
Granular volcanic rock, used to improve the aeration in potting soil. No nutrient value.
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http://www.encyclo.co.uk/local/20077
Expanded volcanic glass, very light in weight and useful as insulation although it is not as effective as some materials. Can be added to plaster and is fire resistant.
Found on
http://www.encyclo.co.uk/local/20453
An aggregate formed by heating and expanding siliceous volcanic glass.
Found on
http://www.encyclo.co.uk/local/20933
Per'lite noun (Min.) Same as
Pearlite .
Found on
http://www.encyclo.co.uk/webster/P/58
Granular volcanic rock used to lighten potting soil and improve its aeration.
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http://www.greeneducationfoundation.org/greenthumbchallengesub/gardening-re
A perlite is an obsidian, or other vitreous rock with a concentric structure and which is expansible by heating.
Found on
http://www.probertencyclopaedia.com/browse/HP.HTM
An aggregate used in lightweight insulating concrete and in preformed perlitic insulation boards, formed by heating and expanding siliceous volcanic glass.
Found on
http://www.rbroof.com/glossary-of-terms
An additive that aerates the medium, preventing compaction, creating air pockets, and reducing water retention. Is usually in either, medium or coarse grades, and is a white colour, appearing almost like small stones, it's light to lift and easily crushed into powder... No you can't snort it to get high
Found on
http://www.rollitup.org/general-marijuana-growing/98008-glossary-terms.html
A mineral, which when expanded by a heating process forms light granuals. Perlite is a good addition to container potting mixes, to promote moisture retention while allowing good drainage.
Found on
http://www.thegardenhelper.com/dictionary.html
A natural occuring volcanic glass that when heated produces a lightweight material that retains moisture yet promotes drainage. It has no know toxicity, does not decompose, and does not contain weeds, disease or insects.
Found on
http://www.vegetablegardeninglife.com/vegetable-gardening-glossary.html
Term for a glassy effusive rock (volcanic glass, obsidian) formed by chemical and physical processes. At an advanced stage of transformation, a loose rock of bluish-green, brownish or grey colour is formed. Pearlite is used for many purposes such as in the building industry. In winemaking it is used as a filter aid during filtration. The rock ...
Found on
https://glossary.wein.plus/perlite
A highly siliceous volcanic rock which can be expended by heating into a porous mass of particles. Perlite can be used as an insulation in foundry sand mixtures. Not to be confused with Pearlite.
Found on
https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
a partially altered glassy volcanic rock with a chemical composition similar to that of obsidians (i.e. of granites) that is characterized by closely spaced concentric cracks; most perlites are light gray in color.
Found on
https://www.encyclo.co.uk/local/20132
A mineral used in potting mix to retain moisture and provide aeration.
Found on
https://www.encyclo.co.uk/local/22486
Granular volcanic rock which when expanded by a heating process forms light granules. Used to improve the aeration in potting soil, no nutrient value. Perlite is a good addition to container potting mixes, to promote moisture retention while allowing good drainage.
Found on
https://www.encyclo.co.uk/local/22488
Perlite is a very light weight, heat-treated volcanic rock that is used to improve drainage and to increase the pore space, for oxygen availability to the roots, in potting soil.
Found on
https://www.encyclo.co.uk/local/23353
Perlite is a very light weight, heat-treated volcanic rock that is used to improve drainage and to increase the pore space, for oxygen availability to the roots, in potting soil.
Found on
https://www.encyclo.co.uk/local/23362
A mineral used in potting mix to retain moisture and provide aeration.
Found on
https://www.lowes.com/projects/lawn-and-garden/garden-glossary/project
A highly siliceous volcanic rock which can be expended by heating into a porous mass of particles. Perlite can be used as an insulation in foundry sand mixtures. Not to be confused with Pearlite.
Found on
https://www.metaltek.com/resources/glossary/
No exact match found.
