cot·ton 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
enlarge image药棉；脱脂棉 - cotton wool balls
药用棉球
Oxford Collocations DictionaryCotton wool is used before these nouns:- pad
- cotton wool balls