vacuum : Idioms & Phrases

• noun electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  tube; electron tube; thermionic vacuum tube; thermionic valve; thermionic tube.
  

WordNet

• (Physics), a vacuum produced by filling with a fluid, as mercury, a tube hermetically closed at one end, and, after immersing the other end in a vessel of the same fluid, allowing the inclosed fluid to descend till it is counterbalanced by the pressure of the atmosphere, as in the barometer.

Webster 1913

• noun a method of induced abortion; prior to the 14th week of gestation the embryo and placenta are removed by applying suction to the dilated cervix
  suction curettage.
  

WordNet

• noun a bag into which dirt is sucked by a vacuum cleaner
  dust bag.
  

WordNet

• noun a bomb that uses a fuel-air explosive
  fuel-air bomb; thermobaric bomb; volume-detonation bomb; aerosol bomb.
  
  • a thermobaric bomb can create overpressures equal to an atomic bomb

WordNet

• noun flask with double walls separated by vacuum; used to maintain substances at high or low temperatures
  vacuum bottle.
  

WordNet

• a kind of continuous brake operated by exhausting the air from some appliance under each car, and so causing the pressure of the atmosphere to apply the brakes.

Webster 1913

• noun a chamber from which nearly all matter (especially air) has been removed
  

WordNet

• noun an electrical home appliance that cleans by suction
  vacuum.
  

WordNet

• noun flask with double walls separated by vacuum; used to maintain substances at high or low temperatures
  vacuum bottle.
  

WordNet

• noun a gauge for indicating negative atmospheric pressure
  vacuum gage.
  

WordNet

• noun a gauge for indicating negative atmospheric pressure
  vacuum gage.
  

WordNet

• (Technol.), a kind of large closed metallic retort used in sugar making for boiling down sirup. It is so connected with an exhausting apparatus that a partial vacuum is formed within. This allows the evaporation and concentration to take place at a lower atmospheric pressure and hence also at a lower temperature, which largely obviates the danger of burning the sugar, and shortens the process.

Webster 1913

• noun a pump that moves air in or out of something
  air pump.
  

WordNet

• . Same as Pulsometer, 1.

Webster 1913

• noun electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  tube; electron tube; thermionic vacuum tube; thermionic valve; thermionic tube.
  

WordNet

• (Phys.), a glass tube provided with platinum electrodes and exhausted, for the passage of the electrical discharge; a Geissler tube. any tube used in electronic devices, containing a vacuum and used to control the flow of electrons in a circuit, as a vacuum diode, triode, or pentode, or a .

Webster 1913

• a safety valve opening inward to admit air to a vessel in which the pressure is less than that of the atmosphere, in order to prevent collapse.

Webster 1913

• verb clean with a vacuum cleaner
  hoover; vacuum.
  
  • vacuum the carpets

WordNet