Definitions
from The Century Dictionary.
- noun A white fibrous material made by blowing a stream of air or steam through molten slag as it comes from the blast-furnace or other metallurgical process. Usually known as mineral wool.
Etymologies
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Examples
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Put the seed in a growth medium (soil or rock-wool), approximately the size of the seed under the surface (about 5 mm).
WN.com - Articles related to Petron to slash oil prices Monday 2010
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Put the seed in a growth medium (soil or rock-wool), approximately the size of the seed under the surface (about 5 mm).
WN.com - Articles related to Petron to slash oil prices Monday 2010
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Vermiculite and possibly some rock-wool insulating materials may contain asbestos, a known health hazard.
The Seattle Times 2010
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This the main reason we use insulating rock-wool and NOT reflective tin-foil in our roofs!
WHAT REALLY HAPPENED 2009
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