rock wool
Americannoun
noun
Etymology
Origin of rock wool
First recorded in 1925–30
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
He has spent £4,000 on reports that suggest a mix of rock wool and polystyrene insulation - and a botched removal - have caused persistent damp.
From BBC ● May 10, 2023
They are then set in a pot of rock wool in a tub that is regularly flooded with nutrient-enriched water.
From Reuters ● Jul. 23, 2010
Its chief feature is a new insulating material called Plastic Foam, which looks like dry ice, weighs only a tenth as much as rock wool or cork board, is fireproof, waterproof, soundproof.
From Time Magazine Archive
Non-inflammable, it has a specific gravity between .008 and .012; among currently popular insulators, rock wool ranges from .15 to .25, fiber glass from .02 to .15.
From Time Magazine Archive
MEMBER: We have used rock wool; planted in the spring.
From Northern Nut Growers Association Report of the Proceedings at the Forty-Second Annual Meeting Urbana, Illinois, August 28, 29 and 30, 1951 by Northern Nut Growers Association
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
