Also found in: Thesaurus, Encyclopedia, Wikipedia.
Related to perlite: Perlite Concrete


also pearl·ite  (pûr′līt′)
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.

[French (from perle, pearl, from Old French; see pearl1) or German Perlit (from Perle, pearl, ultimately from Vulgar Latin *pernula).]

per·lit′ic (pər-lĭt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈpɜːlaɪt) or


(Minerals) a variety of obsidian consisting of masses of small pearly globules: used as a filler, insulator, and soil conditioner
[C19: from French, from perle pearl1]
perlitic, pearlitic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈpɜr laɪt)

a volcanic glass in which concentric fractures impart a distinctive structure resembling masses of small spheroids, used as a plant growth medium.
[1825–35; < French; see pearl1, -ite1]
per•lit′ic (-ˈlɪt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Mentioned in ?
References in classic literature ?
They say she begins already to see 'at he isn't not altogether that nice, generous, perlite, delightful gentleman 'at she thought him afore marriage - he begins a being careless and masterful already.
" `Nom' says he, `not exactly in the business, but I `ave made pets of several.' and with that he lifts his `at as perlite as a lord, and walks away.
M2 PRESSWIRE-August 27, 2019-: Global Perlite Mining Market Report 2019: Historical Data & Forecasts 2014-2022
(Alliance News) - Sunrise Resources PLC on Wednesday announced successful proof-of-concept perlite processing trials and expansion of horticultural-grade perlite in further customer trials.
Summary: Shandong [China], Mar 30 (ANI): Five people were killed while three were injured after an explosion at a perlite factory in Qingzhou here on Friday night, according to Chinese state media.
Vermiculite and perlite are two lightweight aggregates, the first made from heated mica and the second from heated volcanic rock.
The product portfolio includes over 150 filtration products, including the Imerys brands of Diatomite and Perlite products.
For example, adding perlite to the soil helps lighten the ground and delivers drainage.
Silica Company, which produces products derived from diatomaceous earth, perlite, engineered clays, and non-activated clays.
EP Minerals, LLC and its affiliate, EP Engineered Clays Corp., are global producers of engineered materials derived from industrial minerals, including diatomaceous earth, perlite and calcium bentonite, which are used in the clarification and purification of liquids, and as catalysts, absorbents and functional additives.