Where does “magnetohidrodinámico” come from?

magnetohidrodinámico (Spanish) comes from Spanish hidrodinámico, from Spanish dinámico, from Ancient Greek δυναμικός, from Ancient Greek -ικός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.

magnetohidrodinámico (Spanish): magnetohydrodynamic