[ son-uh-boo-e, -boi ]
/ ˈsɒn əˌbu ɛ, -ˌbɔɪ /
a buoy that emits a radio signal on receiving an underwater signal from a vessel.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for sonobuoy
/ (ˈsəʊnəˌbɔɪ) /
a buoy equipped to detect underwater noises and transmit them by radio
Word Origin for sonobuoy
from sonic + buoy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012