| 单词 | spectroheliograph |
| 释义 | Word Frequency spectroheliograph(ˌspɛktrəʊˈhiːlɪəˌɡrɑːf, -ˌɡræf) noun 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 Derived forms spectroheliographic (ˌspectroˌhelioˈgraphic) adjective Word origin C19: from spectro- + helio- + -graph |
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