Definition of hydromagnetics in English:

hydromagnetics

plural noun

another term for magnetohydrodynamics
‘In a cold plasma, hydromagnetics breaks down once the wave frequency become comparable to this frequency.’
another term for magnetohydrodynamics
‘The motion of a dispersed medium under space conditions can obviously not be treated without hydromagnetics and plasma physics as a basis.’

Pronunciation

hydromagnetics

/ˌhʌɪdrə(ʊ)maɡˈnɛtɪk/