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probe noun

  /pɹoʊb/ , /pɹəʊb/
  • (aeronautics) A tube attached to an aircraft which can be fitted into the drogue from a tanker aircraft to allow for aerial refuelling. [from 20th c.]
  • (sciences) A small device, especially an electrode, used to explore, investigate or measure something by penetrating or being placed in it. [from 20th c.]
  • (astronautics) A small, usually uncrewed, spacecraft used to acquire information or measurements about its surroundings. [from 20th c.]
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