/ flɒs; NAmE flɔːs; flɑːs/ noun , verb
■ noun [ U ]
1.
= dental floss
2.
thin silk thread
—see also candyfloss
■ verb
[ v , vn ] to clean between your teeth with dental floss
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WORD ORIGIN
mid 18th cent.: from French (soie) floche floss (silk), from Old French flosche down, nap of velvet, of unknown origin.