Definition of pressure tube in US English:

pressure tube


  • 1A tube containing liquid or gas under pressure.

  • 2Specifically. A tube in which pressurized coolant or moderator is passed through the core in certain types of nuclear reactor. Usually attributive in "pressure tube reactor".

  • 3A tube open at one or more points to a surrounding fluid whose velocity or pressure it is used to measure. Usually attributive in "pressure tube anemometer".


Mid 19th century. From pressure + tube.