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 Van de Kamp had been using Sproul Observatory’s 61-centimeter refractor telescope to take photographic plates of Barnard’s Star. Bruce Dorminey, Forbes, 19 May 2021 Schmidt Cassegrain scopes are basically a design combining the optics of both the reflector and refractor scopes. Mike Lynch, Twin Cities, 24 Nov. 2019 There are three basic types of telescopes; reflectors, refractors, and Schmidt Cassegrain telescopes. Mike Lynch, Twin Cities, 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,, 5 July 2018 That’s the home of the Florida’s largest publicly accessible refractor telescope, armed with a 10-inch lens. Dewayne Bevil,, 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, 5 May 2018 The workshop will feature demonstrations on refractor, dobsonian, reflector and catadioptric telescopes. Rebecca Hazen, Houston Chronicle, 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, 21 Aug. 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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Time Traveler for refractor

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The first known use of refractor was in 1769

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Cite this Entry

“Refractor.” Dictionary, Merriam-Webster, Accessed 20 Sep. 2021.

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