Definition of helioseismic in English:

helioseismic

adjective

Astronomy
  • Of or relating to oscillations at the sun's surface.

Origin

1980s; earliest use found in Scientific American. From helio- + seismic, after helioseismology.

Pronunciation

helioseismic

/ˌhiːlɪə(ʊ)ˈsʌɪzmɪk/