floss  
 noun [ U ] uk/flɒs/ us/flɑːs/
  (TEETH)     
  (同 dental floss)
→  dental floss 
   (THREAD)      
 (尤指昆虫吐出或植物长出的)丝线
a mass of soft, smooth threads especially produced by particular insects and plants
 See also: candyfloss 
 floss  
verb uk/flɒs/ us/flɑːs/
  (TEETH)      
  [ I or T ]用牙线清洁(牙缝) 
to clean between your teeth using dental floss
  It's important to floss every day. 每天用牙线清洁牙缝很重要。 
   (BEHAVIOUR)     
 [ I ] US slang刻意引人注目(或仰慕) 
to behave in a way that is intended to attract attention or admiration