Word.ws English Dictionary

rockwool

rockwool noun: inorganic material resembling fiber, used primarily for insulation and soundproofing.

Noun

rockwool (countable and uncountable, plural rockwools)

  1. Inorganic material resembling fiber, used primarily for insulation and soundproofing.
  2. A horticultural growing medium made from natural ingredients, usually including basalt rock and chalk.
    • In 1985, rockwool was introduced to the United States as an alternative to conventional soil and other soilless mediums. Rockwool is made of thin fibers of volcanic rock or a combination of volcanic rock, limestone, and coke.1997, George F. Van Patten, Alyssa F. Bust, Gardening Indoors with Cuttings

Forms of rockwool

pluralrockwools
alternative formrock wool

Origin of rockwool

From rock + wool.

Questions about rockwool

What does rockwool mean?
Rockwool means inorganic material resembling fiber, used primarily for insulation and soundproofing.
What part of speech is rockwool?
Rockwool is a noun.
What is the plural of rockwool?
The plural of rockwool is rockwools.

Words near rockwool in the dictionary

  1. Rockwellized
  2. rockwheel
  3. rockwheels
  4. rockwood
  5. Rockwoods
  6. rockwool
  7. rockwools
  8. rockwork
  9. rockworks
  10. rockwren
  11. rockwrens

Source and license

Adapted from Wiktionary: rockwool (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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