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      2. 
		
		
      
			
			
      
				
			
      
			
			
		
      
    
      
        
      
            
      
                
                    
      
	
      vaccine
      
	
      英 ['v?ksi?n; -?n]
美[v?k'sin]

      


	    
      
	
        
    
      • n. 疫苗；牛痘苗
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      • adj. 疫苗的；牛痘的
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      英英釋意
      
	
      
	
      1. immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies