ranz des vaches

Ranz des vaches \Ranz" des` vaches"\ (r[aum]Ns" d[asl]`
   v[.a]sh"). [F., the ranks or rows of cows, the name being
   given from the fact that the cattle, when answering the
   musical call of their keeper, move towards him in a row,
   preceded by those wearing bells.]
   The name for numerous simple, but very irregular, melodies of
   the Swiss mountaineers, blown on a long tube called the
   Alpine horn, and sometimes sung.
   [1913 Webster]