spec·tro·he·li·o·graph (sp k tr -h  l- -gr f)n. An instrument used to make spectroheliograms. spec tro·heli·o·graphic adj.spec tro·heli·ogra·phy (- gr-f) n. |
spectroheliograph [ˌspɛktrəʊˈhiːlɪəˌgrɑːf -ˌgræf]
n
(Astronomy) an instrument used to obtain an image of the sun in light of a particular wavelength, such as calcium or hydrogen, to show the distribution of the element over the surface and in the solar atmosphere. The image obtained is a spectroheliogram
[from spectro- + helio- + -graph]
spectroheliographic adj
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