wrecking ball

noun
🔊/ˈrekɪŋ bɔːl/
🔊/ˈrekɪŋ bɔːl/
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  1. a heavy metal ball that hangs from a crane and is used to hit a building to make it fall down(悬挂于吊车供拆除建筑物用的)破碎球,落锤Topics Buildingsc2