n. 滤波器, 过滤器, 滤光器, 过滤嘴, 去尘器

vt. 过滤, 渗透, 走漏

vi. 滤过, 渗入

[计] 过滤器, 筛选

[化] 滤器过滤设备; 滤机过滤设备; 滤波器; 滤光器; 滤色片; 滤光片

[医] 滤器

Filter \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}.


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.

{Filtering paper}, or {Filter paper}, a porous unsized paper,
for filtering.


Filter \Fil"ter\, v. i.
To pass through a filter; to percolate.


Filter \Fil"ter\, n.
Same as {Philter}.