floss
noun /flɒs/
/flɑːs/
[uncountable]- (also dental floss)a type of very thin string that is used for cleaning between the teeth
牙线: 一种非常细的线,用于清洁牙齿之间 - thin silk thread
see also candyfloss丝线
词源mid 18th cent.: from French (soie) floche ‘floss (silk)’, from Old French flosche ‘down, nap of velvet’, of unknown origin.