Arcturus

American  

[ahrk-toor-uhs, -tyoor-] / ɑrkˈtʊər əs, -ˈtyʊər- /

noun

Astronomy.

1. a first-magnitude star in the constellation Boötes.

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Arcturus British  

/ ɑːkˈtjʊərəs /

noun

1. the brightest star in the constellation Boötes: a red giant. Visual magnitude: –0.4; spectral type: K2III; distance: 37 light years

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Arcturus Scientific  

/ ärk-tr′əs /

1. A giant star in the constellation Boötes. It is the brightest star in the Northern Hemisphere and the fourth brightest star in the sky, with an apparent magnitude of 0.00. Scientific name: Alpha Boötes.

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Other Word Forms

• Arcturian adjective

Etymology

Origin of Arcturus

1352–75; < Latin < Greek Arktoûros, equivalent to árkt ( os ) bear + -oûros keeper; replacing Middle English arture < Middle French

Example Sentences

To find the area of sky where it should appear, she advises to first locate the plough and follow its handle to Arcturus.

From BBC

And I do have stellar favorites, which I always look for first after stepping outside: Vega, high up in the constellation Lyra, Arcturus in Boötes and Antares in Scorpius, to name just a few.

From Scientific American

Meanwhile, Arcturus has jumped to around 12.5 percent of cases, a rise from just 1 percent at the end of March.

From Salon

Arcturus isn’t the first variant that has shown an affinity for receptors in the eyes.

From Scientific American

Coronavirus levels in Los Angeles County wastewater have ticked up, potentially as a result of the arrival of a more infectious Omicron subvariant dubbed Arcturus.

From Los Angeles Times