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2017 Word of the Year

spectroheliogram

[spek-troh-hee-lee-uh-gram] /ˌspɛk troʊˈhi li əˌgræm/
noun
1.
a photograph of the sun made with a spectroheliograph.
Origin of spectroheliogram
1905-1910
First recorded in 1905-10; spectro- + heliogram
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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