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riffler

American  
[rif-ler] / ˈrɪf lər /

noun

  1. a small curved file.


riffler British  
/ ˈrɪflə /

noun

  1. a file with a curved face for filing concave surfaces

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of riffler

1790–1800; perhaps < German riffel ( n ) to cut grooves into (an object) + -er 1; compare French rifloir a kind of file ( rifle 2 )