Topic: HAIR AND BEAUTY
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cotton wool [uncountable] British English
1DCB a soft mass of cotton that you use especially for cleaning and protecting wounds : 
She put some disinfectant on a piece of cotton wool and dabbed it on her cheek.
She put some disinfectant on a piece of cotton wool and dabbed it on her cheek.2 to protect someone completely from the dangers, difficulties etc of life : You can't wrap those kids in cotton wool all their lives.
wrap somebody (up) in cotton wool
You can't wrap those kids in cotton wool all their lives.
