ultrasonic vs. ultrasound
[uhl-truh-son-ik]
/ ˌʌl trəˈsɒn ɪk /
adjective
[uhl-truh-sound]
/ ˈʌl trəˌsaʊnd /
noun
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Physics. sound with a frequency greater than 20,000 Hz, approximately the upper limit of human hearing.
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Medicine/Medical. the application of ultrasonic waves to therapy or diagnostics, as in deep-heat treatment of a joint or imaging of internal structures.
