English
heliomagnetism
From helio- + magnetism.
A compound of helio- + magnetism
Proto-Indo-European *sóh₂wl̥ ‘sun’
Proto-Hellenic *hāwélios ‘sun’
Ancient Greek ἥλιος ‘sun’
English helio-
Today it means
noun the magnetic field, and associated activity, of the sun
Language periods are conventional ranges, not dates for this word.
Etymograph / heliomagnetism