spectroheliograph
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spec·tro·he·li·o·graph
(spĕk′trō-hē′lē-ə-grăf′)n.
An instrument used to make spectroheliograms.
spec′tro·he′li·o·graph′ic adj.
spec′tro·he′li·og′ra·phy (-ŏg′rə-fē) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
spectroheliograph
(ˌspɛktrəʊˈhiːlɪəˌɡrɑːf; -ˌɡræf)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
[C19: from spectro- + helio- + -graph]
ˌspectroˌhelioˈgraphic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
spec•tro•he•li•o•graph
(ˌspɛk troʊˈhi li əˌgræf, -ˌgrɑf)n.
an apparatus for making a photograph of the sun (spectroheliogram) in a single spectral band.
[1890–95]
spec`tro•he`li•o•graph′ic, adj.
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