Definitions for "magnetohydrodynamics"
The study of the interaction of magnetic fields with electrically conductive fluids, such as a plasma or a molten metal.
the study of the interaction of magnetic fields and electrically conducting fluids (as plasma or molten metal)
Just as HydroDynamics is the study of the motion and dynamics of fluids such as water, MHD is the study of plasma motion and dynamics in the presence of electric magnetic fields.