water filter

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A device that removes impurities—e.g., heavy metals, chlorine, microorganisms, pesticides—from drinking water
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

water filter

Public health A device that removes impurities from the water–eg, heavy metals, chlorine, microorganisms, pesticides. See Bottled water.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.