A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another.
User Defined Definitions
"device that removes something from whatever passes through it"
"an electrical device that alters the frequency spectrum of signals passing through it"
"remove by passing through a filter"
"pass through"
"run or flow slowly, as in drops or in an unsteady stream"