English
helioseismology
From helio- + seismology.
A compound of helio- + seismology
Proto-Indo-European *sóh₂wl̥ ‘sun’
Proto-Hellenic *hāwélios ‘sun’
Ancient Greek ἥλιος ‘sun’
English helio-
Today it means
noun The study of the propagation of pressure waves in the Sun.
Language periods are conventional ranges, not dates for this word.
Etymograph / helioseismology