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coronagraph

American  
[kuh-roh-nuh-graf, -grahf] / kəˈroʊ nəˌgræf, -ˌgrɑf /
Or coronograph

noun

Astronomy.
  1. an instrument for observing and photographing the sun's corona, consisting of a telescope fitted with lenses, filters, and diaphragms that simulate an eclipse.


coronagraph British  
/ -ˌɡræf, kəˈrəʊnəˌɡrɑːf /

noun

  1. an optical instrument used to simulate an eclipse of the sun so that the faint solar corona can be studied

"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

Other Word Forms

Etymology

Origin of coronagraph

1885–90; earlier coronograph. See corona, -graph

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Roman is scheduled to conduct a technology demonstration that will test advanced coronagraph systems.

From Science Daily Dec. 21, 2025

India’s coronagraph, Prof Ramesh says, has a slight advantage over the coronagraph in Nasa-ESA's joint Solar and Heliospheric Observatory.

From BBC Nov. 26, 2024

It will also carry the first operational compact coronagraph that will help detect space weather for early warnings of disruptions to power grids, communications and navigation systems.

From Los Angeles Times May 30, 2024

But Roman will play a crucial role alongside its other scientific objectives: testing the advanced coronagraph technology that will be needed to produce images of potentially habitable Earth-like worlds around stars like our sun.

From Scientific American Jan. 23, 2023

Similar ill success attended his and Professor Riccò's employment, on Mount Etna in July, 1894, of a specially designed coronagraph.

From A Popular History of Astronomy During the Nineteenth Century Fourth Edition by Clerke, Agnes M. (Agnes Mary)

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