English
heliotomography
From helio- + tomography.
Formed from helio- + tomography
Proto-Indo-European *sóh₂wl̥ ‘sun’
Proto-Hellenic *hāwélios ‘sun’
Ancient Greek ἥλιος ‘sun’
English helio-
Today it means
noun The three-dimensional analysis of the structure of the sun, especially of convection currents
Language periods are conventional ranges, not dates for this word.
Etymograph / heliotomography