verb (used with object), verb (used without object), filtrated, filtrating.
to filter.
liquid that has been passed through a filter.

1605–15; < Medieval Latin filtrātus filtered, past participle of filtrāre. See filter, -ate1

filtratable, adjective
filtration, noun
interfiltrate, verb (used with object), interfiltrated, interfiltrating.
interfiltration, noun
transfiltration, noun
unfiltrated, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
filtrate (ˈfɪltreɪt)
1.  a liquid or gas that has been filtered
2.  another name for filter
[C17: from Medieval Latin filtrāre to filter]

filtration (fɪlˈtreɪʃən)
the act or process of filtering

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1610s, probably a back formation from filtration.

c.1600, perhaps from Fr. filtration (1570s), from filter to filter (see filter).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

filtrate fil·trate (fĭl'trāt')
v. fil·trat·ed, fil·trat·ing, fil·trates
To put or go through a filter. n.
Material, especially liquid, that has passed through a filter.

filtration fil·tra·tion (fĭl-trā'shən)
The process of passing a liquid through a filter.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
filtration   (fĭl-trā'shən)  Pronunciation Key 
The act or process of filtering, especially the process of passing a liquid or gas, such as air, through a filter in order to remove solid particles.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Water filtration is important, so it's a good idea to buy the best filter you
  can afford.
The water is piped to a filtration plant and then to a heat-transfer station on
  the lakeside.
Water used to irrigate food crops must undergo secondary filtration and
Standard distillation or filtration techniques could extract the alcohol from
  the water.
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