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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Faluns  \Fa`luns"\,  n.  [F.]  (Geol.) 
  A  series  of  strata,  of  the  Middle  Tertiary  period,  of  France, 
  abounding  in  shells,  and  used  by  Lyell  as  the  type  of  his 
  Miocene  subdivision.