refractor

noun
re·frac·tor | \ri-ˈfrak-tər \

Definition of refractor 

: a telescope whose principal focusing element is a lens

Examples of refractor in a Sentence

Recent Examples on the Web

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 Rokko Szarell, 8, of Radcliffe, Kentucky, who is visiting relatives in Aurora, climbed on a small step ladder to look through a refractor lens telescope that was manned by Bob Wiersma of North Olmsted. Carol Kovach, cleveland.com, "Sun sets on a perfect Lakewood Summer Solstice Celebration," 22 June 2017 Continuum has a large, rare collection of ribbed, holophane fixtures which use borosilicate glass reflectors and refractors to provide an untainted light, and are considered mid-20th century industrial art. Mary Ellen Fillo, courant.com, "Cape Cod Shopping, Dining, Trips For When You're Not At The Beach," 17 May 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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