1. 
   bergerette
   (from the article `virelai`) ...for the refrain; and it was usually even written in a different metre. The form thus allowed more musical variety than did the rondeau. These ...
   Found op http://www.britannica.com/eb/a-z/b/51
   
   
2. 
   Bergerette
   A bergerette, or shepherdess` air, is a form of early rustic French song. The bergerette, developed by Burgundian composers is a virelai with only is single stanza. It is one of the "fixed forms" of early French song and related to the rondeau. Examples include Josquin`s Bergerette savoyene include...
   Found op http://en.wikipedia.org/wiki/Bergerette
   
   

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