[1] : The Collaborative International Dictionary of English v.0.48

filter \fil"ter\, v. t. imp.  p. p. filtered; p. pr.  vb.
   n. filtering cf. f. filter. see filter, n., and cf.
   filtrate.
   to purify or defecate, as water or other liquid, by causing
   it to pass through a filter.
   1913 webster

   filtering paper, or filter paper, a porous unsized paper,
      for filtering.
      1913 webster
see also:
filtered filtering filter filtrate filtering paper filter paper 

[2] : WordNet (r) 2.0

filter paper
     n : a porous unsized paper used for filtering

Filter Paper >> F Words
Filter Paper, definition of term: Filter Paper
filter+paper_pag1.html

Paper >> P Words
Paper, definition of term: Paper
paper_pag1.html

Filter >> F Words
Filter, definition of term: Filter
filter_pag1.html

Paper Chase >> P Words
Paper Chase, definition of term: Paper Chase
paper+chase_pag1.html

Paper Bag >> P Words
Paper Bag, definition of term: Paper Bag
paper+bag_pag1.html

Paper Chromatog >> P Words
Paper Chromatog, definition of term: Paper Chromatog
paper+chromatog_pag1.html

Paper Money >> P Words
Paper Money, definition of term: Paper Money
paper+money_pag1.html

Filter Out >> F Words
Filter Out, definition of term: Filter Out
filter+out_pag1.html

Paper Towel >> P Words
Paper Towel, definition of term: Paper Towel
paper+towel_pag1.html

Paper Currency >> P Words
Paper Currency, definition of term: Paper Currency
paper+currency_pag1.html

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