spectroheliograph

[ spek-troh-hee-lee-uh-graf, -grahf ]
/ ˌspɛk troʊˈhi li əˌgræf, -ˌgrɑf /

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.

QUIZZES

DON’T VACILLATE! VANQUISH THIS WORD OF THE DAY QUIZ!

It’d be a real faux pas to miss this quiz on the words from August 3–9, 2020!
Question 1 of 7
What does “vacillate” mean?
to waver in mind or opinion; be indecisive or irresolute.
to cause to be empty or unoccupied.
to assent tacitly; agree; consent.
TAKE THE QUIZ TO FIND OUT

Origin of spectroheliograph

First recorded in 1890–95; spectro- + heliograph

OTHER WORDS FROM spectroheliograph

spec·tro·he·li·o·graph·ic [spek-troh-hee-lee-uh-graf-ik], /ˌspɛk troʊˌhi li əˈgræf ɪk/, adjective

Words nearby spectroheliograph

spectrofluorimeter, spectrogram, spectrograph, spectrography, spectroheliogram, spectroheliograph, spectrohelioscope, spectrology, spectrometer, spectrometry, spectromicroscope
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for spectroheliograph

British Dictionary definitions for spectroheliograph

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 of spectroheliograph

spectroheliographic, 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