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refractor

noun

re·​frac·​tor ri-ˈfrak-tər How to pronounce refractor (audio)
: a telescope whose principal focusing element is a lens

Example Sentences

Recent Examples on the Web Gears inside the 1891 Ladd Observatory’s 12-inch refractor telescope. Carlos R. Muñoz, BostonGlobe.com, 18 Feb. 2022 The area, featuring a large refractor telescope with a 10-inch lens, has been off-limits to the public as a pandemic precaution since March 2020. Dewayne Bevil, orlandosentinel.com, 5 Nov. 2021 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, chicagotribune.com, 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, 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 See More

Word History

First Known Use

1769, in the meaning defined above

Time Traveler
The first known use of refractor was in 1769

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