spectroheliograph

[spek-troh-hee-lee-uh-graf, -grahf]

noun

an apparatus for making photographs of the sun with a monochromatic light to show the details of the sun's surface and surroundings as they would appear if the sun emitted only that light.

Origin of spectroheliograph

First recorded in 1890–95; spectro- + heliograph

Related formsspec·tro·he·li·o·graph·ic

[spek-troh-hee-lee-uh-graf-ik] /ˌspɛk troʊˌhi li əˈgræf ɪk/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for spectroheliograph

Historical Examples of spectroheliograph

In the subterranean chamber is the spectroheliograph of exceptional size and power.
Astronomy
David Todd
He moved to the spectroheliograph, where the zed-ray connections were still humming.
Astounding Stories of Super-Science April 1930
Various

British Dictionary definitions for spectroheliograph

spectroheliograph

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 Formsspectroheliographic, adjective

Word Origin for spectroheliograph

C19: from spectro- + helio- + -graph

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012