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Fi"lose` (?), a. [L. filum a
thread.] Terminating in a threadlike process.

Fil"ter (?), n. [F. filtre, the
same word as feutre felt, LL. filtrum, feltrum,
felt, fulled wool, this being used for straining liquors. See
Feuter.] Any porous substance, as cloth, paper, sand, or
charcoal, through which water or other liquid may passed to cleanse
it from the solid or impure matter held in suspension; a chamber or
device containing such substance; a strainer; also, a similar device
for purifying air.

Filter bed, a pond, the bottom of which is a
filter composed of sand gravel. -- Filter
gallery, an underground gallery or tunnel, alongside of
a stream, to collect the water that filters through the intervening
sand and gravel; -- called also infiltration gallery.

Fil"ter, v. t. [imp.


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