Definition of supersonics in English:

supersonics

plural noun

treated as singular
another term for ultrasonics
‘There is something for everyone, whether their interest is in electronics, engineering, palaeontology, biology, genetics, chemistry, ichthyology, supersonics, space, aliens or anything else of - or indeed not of - this planet.’
another term for ultrasonics

Pronunciation

supersonics

/suːpəˈsɒnɪks/