| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024phil•tre (fil′tər),USA pronunciation n., v.t., -tred, -tring. [Chiefly Brit.]- British Termsphilter.
Collins Concise English Dictionary © HarperCollins Publishers:: philtre, US philter /ˈfɪltə/ n - a drink supposed to arouse love, desire, etc
Etymology: 16th Century: from Latin philtrum, from Greek philtron love potion, from philos loving fil•ter /ˈfɪltɚ/USA pronunciation n. [countable]- Chemistryany substance, such as cloth, paper, or charcoal, through which liquid or gas is passed to remove impurities or to trap solids:The spring water goes through a filter before it is bottled.
- Chemistryany device containing a substance for filtering.
- Photographya lens screen of colored glass used in photography to control the color or to diminish the intensity of light.
v. - to remove by the action of a filter:[~ + object]The dehumidifier filters moisture out of the air.
- to act as a filter for; to slow the passage of:[~ + object]The dehumidifier filters the air.
- to pass or slip through slowly:[no object]Sunlight was filtering through the trees.
- [no obj] to reach gradually:Day by day, news filtered out about the catastrophe.
fil•ter•a•ble, fil•tra•ble /ˈfɪltrəbəl/USA pronunciation adj. fil•ter•er, n. [countable] WordReference Random House Learner's Dictionary of American English © 2024phil•ter /ˈfɪltɚ/USA pronunciation n. [countable]- a potion, charm, or drug, esp. one supposed to cause a person to fall in love.
Also,[esp. Brit.,] ˈphil•tre. WordReference Random House Unabridged Dictionary of American English © 2024fil•ter (fil′tər),USA pronunciation n. - Chemistryany substance, as cloth, paper, porous porcelain, or a layer of charcoal or sand, through which liquid or gas is passed to remove suspended impurities or to recover solids.
- Chemistryany device, as a tank or tube, containing such a substance for filtering.
- any of various analogous devices, as for removing dust from air or impurities from tobacco smoke, or for eliminating certain kinds of light rays.
- Informal Termsa filter-tipped cigarette or cigar.
- Photographya lens screen of dyed gelatin or glass for controlling the rendering of color or for diminishing the intensity of light.
- Electronics, Physicsa circuit or device that passes certain frequencies and blocks others.
- Mathematicsa collection of subsets of a topological space, having the properties that the intersection of two subsets in the collection is a subset in the collection and that any set containing a subset in the collection is in the collection.
v.t. - to remove by the action of a filter.
- to act as a filter for;
to slow or partially obstruct the passage of:The thick leaves filtered the sunlight. - to pass through or as through a filter.
v.i. - to pass or slip through slowly, as through an obstruction or a filter:Enemy agents managed to filter into the embattled country.
- Gmc; see felt2
- Medieval Latin filtrum felt, piece of felt used to strain liquids
- late Middle English filtre 1375–1425
- 11.See corresponding entry in Unabridged penetrate, sift, seep, trickle, leak.
WordReference Random House Unabridged Dictionary of American English © 2024phil•ter (fil′tər),USA pronunciation n., v., -tered, -ter•ing. n. - a potion, charm, or drug supposed to cause the person taking it to fall in love, usually with some specific person.
- a magic potion for any purpose.
v.t. - to enchant or bewitch with a philter.
- Latin philtrum; see philtrum
- French philtre
- 1580–90
Collins Concise English Dictionary © HarperCollins Publishers:: filter /ˈfɪltə/ n - a porous substance, such as paper or sand, that allows fluid to pass but retains suspended solid particles: used to clean fluids or collect solid particles
- any device containing such a porous substance for separating suspensions from fluids
- any of various porous substances built into the mouth end of a cigarette or cigar for absorbing impurities such as tar
- any electronic, optical, or acoustic device that blocks signals or radiations of certain frequencies while allowing others to pass
See also band-pass filter - any transparent disc of gelatine or glass used to eliminate or reduce the intensity of given frequencies from the light leaving a lamp, entering a camera, etc
- Brit a traffic signal at a road junction consisting of a green arrow which when illuminated permits vehicles to turn either left or right when the main signals are red
vb - (often followed by out) to remove or separate (suspended particles, wavelengths of radiation, etc) from (a liquid, gas, radiation, etc) by the action of a filter
- (transitive) to obtain by filtering
- (intransitive) followed by through: to pass (through a filter or something like a filter): dust filtered through the screen
- (intransitive) to flow slowly; trickle
Etymology: 16th Century filtre from Medieval Latin filtrum piece of felt used as a filter, of Germanic origin; see felt² |