[hee-lee-uh-skohp] /ˈhi li əˌskoʊp/
a telescope for viewing the sun, adapted to protect the eye of the viewer from the sun’s glare.
noun the study of the sun’s interior by the analysis of its oscillations and sound waves passing through it See asteroseismology Word Origin helio- ‘sun’ + seismology
[hee-lee-uh-sfeer] /ˈhi li əˌsfɪər/ noun, Astronomy. 1. the region around the sun over which the effect of the solar wind extends. /ˈhiːlɪəʊˌsfɪə/ noun 1. the region around the sun outside of which the sun’s influence is negligible and interstellar space begins heliosphere (hē’lē-ə-sfîr’) The large, roughly elliptical region of space around the Sun through which […]
[hee-lee-uh-stat] /ˈhi li əˌstæt/ noun 1. an instrument consisting of a mirror moved by clockwork, for reflecting the sun’s rays in a fixed direction. /ˈhiːlɪəʊˌstæt/ noun 1. an astronomical instrument used to reflect the light of the sun in a constant direction
[hee-lee-oh-tak-sis] /ˌhi li oʊˈtæk sɪs/ noun, Biology. 1. movement of an organism toward or away from sunlight. /ˌhiːlɪəʊˈtæksɪs/ noun 1. movement of an entire organism in response to the stimulus of sunlight