horseshoe  
noun uk/ˈhɔːs.ʃuː/ us/ˈhɔːrs.ʃuː/
  (FOR A HORSE)      
  [ C ]马蹄铁,马掌 
a U-shaped piece of metal that is attached to the bottom of a horse's hoof to protect it
  For many people the horseshoe is a symbol of good luck. 对很多人来说马蹄铁是好运的象征。 
   (GAME)     
horseshoes [ U ] US 掷马蹄铁套柱游戏
a game in which horseshoes are thrown at a wooden or metal rod in the ground
  They spent their free time fishing and playing horseshoes.
 You're not allowed to play horseshoes on the beach.
 We enjoyed a game of horseshoes with some friends.
 Although she's in her eighties, she still plays horseshoes and golfs regularly.
 He was playing horseshoes in his aunt's backyard.