Dictionary.com

rock wool

noun

mineral wool.

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Origin of rock wool

First recorded in1925–30

Words nearby rock wool

rock wallaby, rockweed, Rockwell, Rockwell, Norman, Rockwell number, rock wool, rockwork, rock wren, rocky, Rocky Hill, Rocky Mount
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for rock wool

rock wool

noun

another name for mineral wool
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012