ultrasonographyEnglishOxford Dictionary of Englishultrasonography /ˌʌltrəsəˈnɒɡrəfi / ▸ noun [mass noun] Medicine a technique using echoes of ultrasound pulses to delineate objects or areas of different density in the body. – DERIVATIVES ultrasonographer noun ultrasonographic /ˌʌltrəsɒnəʊˈɣrafɪk/ adjective