velamen 

  1. 名詞
膜, 被膜
根被
/此名詞複數為"velamina"/

    
                        
    2. 
                                            

                

            

            
            

                

                
例句

                

                    
    
                                                    
  1. 
                                The white covering on the mature roots is velamen .                            
    2. 
                                                    
  2. 
                                Their spongy velamen soaks up moisture and nutrients.                            
    3. 
                                                    
  3. 
                                The central core of an orchid root is covered by a spongy material called velamen .                            
    4. 
                                                    
  4. 
                                In some orchids, the velamen includes spongy and fibrous bodies near the passage cells, called tilosomes.                            
    5. 
                                                    
  5. 
                                In the older parts of the roots, a modified spongy epidermis, called velamen , has the function to absorb humidity.                            
    6.