air mattress
noun
            
               plural air mattresses            
        
    
                                
              
          
                                                      : a soft, airtight plastic case that is designed to be inflated and used as a bed                                      
              
                             
And take it from my early 1960s-model spine, a modern air mattress—cheap, simple to inflate and reliable—is something that many parents will find essential when sleeping in a tent.— Steve Stephens
Steve Stephens
                         
                called also air bed
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  Merriam-Webster unabridged




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