sonobuoy

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈsəʊnəˌbɔɪ/US:USA pronunciation: respellingUSA pronunciation: respelling(son′ə bo̅o̅′e, -boi′)


WordReference Random House Unabridged Dictionary of American English © 2026
son•o•bu•oy  (son′ə bo̅o̅′e, -boi′),USA pronunciation n. [Navig.]
  1. Nautical, Naval Termsa buoy that emits a radio signal on receiving an underwater signal from a vessel.
  • sono- + buoy 1940–45

Collins Concise English Dictionary © HarperCollins Publishers::
sonobuoy /ˈsəʊnəˌbɔɪ/ n
  1. a buoy equipped to detect underwater noises and transmit them by radio
Etymology: from sonic + buoy

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