DICT.TW Dictionary Taiwan

 bell·weth·er /ˈbɛlˈwɛðɚ/
 系鈴羊,前導,領導者

 Bell·weth·er n.
 1. A wether, or sheep, which leads the flock, with a bell on his neck.
 2. Hence: A leader. [Contemptuous]
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 bellwether
      n 1: someone who assumes leadership of a movement or activity
      2: sheep that leads the herd often wearing a bell