refiner

From refine + -er.

refiner (plural refiners)

1. One who, or that which, refines.
   • 2012 May 19, Bruce Nichols, “Seaway pipeline sends oil to Texas in historic reversal”, in Reuters‎^[1]:

     The average motorist will not see much, if any, difference in gasoline pump price but oil producers and Gulf Coast refiners expect profits to improve.

   • 2016, Rosemarie Withee, Ken Withee, Jennifer Reed, Office 365 For Dummies, page 101:

     You can think of a search refiner as a filter. Your search for a broad topic might return hundreds of possible results. The refiner allows you to filter this information down based on the configured criteria.

• grain refiner

• fernier, refrein, reinfer