Definition of siphon in English:


Syllabification: si·phon
Pronunciation: /ˈsīfən
(also syphon)


  • 1A tube used to convey liquid upwards from a reservoir and then down to a lower level of its own accord. Once the liquid has been forced into the tube, typically by suction or immersion, flow continues unaided.
    More example sentences
    • In the extinguisher, a plastic siphon tube leads from the bottom of the fire-suppressant reservoir to the top of the extinguisher.
    • Keep a syphon tube in the boot incase you need to make a quick refill.
    • Not one to waste time, I unscrewed the gas cap and slipped the siphon tube into the tank.
  • 1.1 Zoology A tubular organ in an aquatic animal, especially a mollusk, through which water is drawn in or expelled.
    More example sentences
    • The way the siphon directs the water stream controls the animal's forward, backward, and sideways movements.
    • To detect prey, a cone snail uses its siphon, an organ that takes up water and directs it over the gills.
    • These animals are also more capable of avoiding coral overgrowth by greatly elongating their siphons.


[with object] Back to top  
  • 1Draw off or convey (liquid) by means of a siphon.
    More example sentences
    • If straining methods do not adequately filter out the fine particles and sediment from the liqueur, try siphoning off the clear liquid.
    • You can recycle bath and washing water by using the garden hose to syphon the waste water onto the garden.
    • The simplest solutions like siphoning the washing water onto the garden are the most effective in the long run.
  • 1.1Draw off or transfer over a period of time, especially illegally or unfairly: he’s been siphoning money off the firm
    More example sentences
    • He then began to illegally siphon his money from US bank accounts to offshore tax havens through a series of ingenious shell companies.
    • The Government wants to siphon funds off and transfer them elsewhere.
    • False claims of up to £1,000 a year appear to have been siphoned into fraudsters' bank accounts.



More example sentences
  • The port protector caps have a wick-type design to assure water passage through the siphonage drain lines.
  • A loud sucking noise in the piping of a fixture indicates that there is a siphonage action which needs correction.
  • If the hose is connected with an airtight joint, provision should be made to prevent syphonage.


( Zoology )
More example sentences
  • Although similar in shape, with a relatively short siphonal canal, and with fine spiral and thicker axial ornamentation, the two genera differ in several respects, and are probably not closely related.
  • The new genus Pentzia does not belong in Buscyon because Pentzia lacks the shallow sulcus that lies obliquely across the columella at the posterior end of the siphonal canal.
  • Cardinal fossula normally deepens towards cardinal side of coral lum, essentially siphonal in tabularium and septal in inner marginarium.


Pronunciation: /sīˈfänik/
More example sentences
  • The siphonic rainwater disposal system and the central valley gutter are always likely to be a cause of water penetration without regular and routine maintenance.


late Middle English: from French, or via Latin from Greek siphōn 'pipe'. The verb dates from the mid 19th century.

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