1. 
   Evaporation Line
   A faint and usually colorless line that is caused due to evaporation of the urine in then test area. These are lines that show in the result window of the test, where a positive sign would be revealed. An evaporation line develops when the urine on the test area begins to dry. Broader term(s): Pregn...
   Found op http://www.pregnology.com/AZ/E/4
   
   

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