1. 
   sordino
   noun a mute for a violin
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=sordino
   
   
2. 
   Sordino
   Sordino, with alternative forms sordono and sordun, etc., is an Italian term somewhat promiscuously applied by various writers: To these must also be added the surdellina or sordellina, a kind of musette invented (see bagpipe) in Naples in the 17th century, and evidently named after class 2. ==Vari...
   Found op http://en.wikipedia.org/wiki/Sordino
   
   
3. 
   sordino
   see sordina, above
   Found op http://en.wikipedia.org/wiki/Glossary_of_musical_terminology
   
   
4. 
   sordino
   1) Mute 2) Sourdine
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/sordino/1
   
   

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