refractor

noun
re·​frac·​tor | \ ri-ˈfrak-tər How to pronounce refractor (audio) \

Definition of refractor

: a telescope whose principal focusing element is a lens

Examples of refractor in a Sentence

Recent Examples on the Web Schmidt Cassegrain scopes are basically a design combining the optics of both the reflector and refractor scopes. Mike Lynch, Twin Cities, "Skywatch: How to buy a telescope for a gift," 24 Nov. 2019 There are three basic types of telescopes; reflectors, refractors, and Schmidt Cassegrain telescopes. Mike Lynch, Twin Cities, "Skywatch: How to buy a telescope for a gift," 24 Nov. 2019 Distinctive and ornate, the building’s main feature is what’s touted as the world’s largest refractor telescope — with a 40-inch lens, 63-foot tube and total weight of 20 tons. Ted Gregory, chicagotribune.com, "U. of C.'s Yerkes Observatory has been a cherished icon for decades. Now it's for sale, and people are nervous," 5 July 2018 That’s the home of the Florida’s largest publicly accessible refractor telescope, armed with a 10-inch lens. Dewayne Bevil, OrlandoSentinel.com, "Orlando Science Center plans late nights, stargazing sessions," 3 July 2018 Roughly 12 percent were flagged as having weak vision and sent to an adjacent classroom where workers using refractor lenses conducted more tests. Andrew Jacobs, New York Times, "A Simple Way to Improve a Billion Lives: Eyeglasses," 5 May 2018 The workshop will feature demonstrations on refractor, dobsonian, reflector and catadioptric telescopes. Rebecca Hazen, Houston Chronicle, "Lone Star College to host telescope workshop," 1 Feb. 2018 Volunteer Larry Silvestri brought two large homemade telescopes — a white light refractor and H-Alpha telescope — to the Dunes. Meredith Colias, Post-Tribune, "Crowds look to the skies at Dunes eclipse viewing," 21 Aug. 2017 It’s the largest refractor telescope in Florida that the public is allowed to use. Dewayne Bevil, OrlandoSentinel.com, "Orlando Science Center aims to inspire with telescope," 13 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'refractor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of refractor

1769, in the meaning defined above

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The first known use of refractor was in 1769

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Cite this Entry

“Refractor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/refractor. Accessed 4 Jul. 2020.

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