cotton wool
noun/ˌkɒtn ˈwʊl/
/ˌkɑːtn ˈwʊl/
(British English) (US English (absorbent) cotton)
[uncountable]- a soft mass of white material that is used for cleaning the skin or a wound
- cotton wool balls
Oxford Collocations DictionaryCotton wool is used before these nouns:- pad
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cotton wool