1. 
   Dimensionless
   Di·men'sion·less adjective Without dimensions; having no appreciable or noteworthy extent. Milton.
   Found op http://www.encyclo.co.uk/webster/D/67
   
   
2. 
   dimensionless
   (dĭ-men´shәn-lәs) denoting a numerical constant or variable that has no units of measurement.
   Found op http://www.encyclo.co.uk/local/21001
   
   
3. 
   Dimensionless
   • (a.) Without dimensions; having no appreciable or noteworthy extent.
   Found op http://thinkexist.com/dictionary/meaning/dimensionless/
   
   

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