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      umbo
      
	
      英 ['?mb??]
美['?mbo]

      


	    
      
	
        
    
      • n. 盾中心的浮雕；殼嘴；鼓膜凸
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      英文詞源
      
	
      
	
      umbo (n.)
      "boss of a shield," 1921, from Latin umbo "shield-boss, knob, projection."