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magneto-acoustic
magneto-acoustic adj. 
/mæɡˌnɛdoʊəˈkustɪk/ Physics designating or relating to the magnetic and acoustic properties of a substance or their interaction; spec. hydromagnetic.
Brit. /maɡˌniːtəʊəˈkuːstɪk/
, /maɡˌniːtəʊəˈkuːstɪk/U.S. /mæɡˌnidoʊəˈkustɪk/
, /mæɡˌnidoʊəˈkustɪk//mæɡˌnɛdoʊəˈkustɪk/ΘΚΠ
the world > matter > physics > science of sound > [adjective]
acoustic1640
acoustical1803
phonic1823
magneto-acoustic1903
audio1960
1903 Electr. World & Engineer 29 Aug. 340/1 From a magnetic standpoint, ferrotype leaves something to be desired, and from a magneto-acoustic one the writer has often wondered why a spun diaphragm that was thick in the center..and thin around the circumference..has never been advocated.
1964 M. A. Uman Introd. Plasma Physics xiii. 157 A hydromagnetic wave whose time-varying magnetic field is parallel to the uniform static magnetic field is often called a magnetoacoustic wave.
1992 S. P. Maran Astron. & Astrophysics Encycl. 330/2 The magnetoacoustic wave is a compressive disturbance that moves at the magnetoacoustic speed in the direction perpendicular to the magnetic field.
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