DuckCorp Dico

Found one definition

1.                 From The Jargon File (version 4.4.7, 29 Dec 2003):
                   
   
   
                   
                     
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    /U·R·L/, /erl/, n.
       Uniform Resource Locator, an address widget that identifies a document or
       resource on the World Wide Web. This entry is here primarily to record the
       fact that the term is commonly pronounced both /erl/, and /U-R-L/ (the
       latter predominates in more formal contexts).