1. 
   yak butter
   [n] - butter made from yaks` milk
   Found op http://www.webdictionary.co.uk/definition.php?query=yak%20butter
   
   
2. 
   yak butter
   noun butter made from yaks` milk
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=yak%20butter
   
   
3. 
   Yak butter
   Yak butter is butter made from the milk of the domesticated yak (Bos grunniens). It is a staple food item and trade item for herding communities in south Central Asia and the Tibetan Plateau. Many different political entities have communities of herders who produce and consume yak dairy products in...
   Found op http://en.wikipedia.org/wiki/Yak_butter
   
   

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