DuckCorp

DuckCorp Dico

(RFC 2229 compliant dictionary server)
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Found one definition 

  1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                

    
                
                  
    difference limen /dˈɪfɹəns lˈaɪmɛn/ (DL /dˌiːˈɛl/)
Unterscheidungsschwelle <fem>
         Note: z. B. bei Farbtönen
   Synonym: difference threshold