rock wool

1. 1.

   a light fibrous material used as an insulator

   Synonymsmineral wool

   Broaderinsulator

Questions about rock wool

What does rock wool mean?

rock wool means "a light fibrous material used as an insulator".

What is another word for rock wool?

Close synonyms include mineral wool. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is rock wool a common word?

rock wool is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.