great circle

noun

: a circle formed on the surface of a sphere by the intersection of a plane that passes through the center of the sphere
specifically : such a circle on the surface of the earth an arc of which connecting two terrestrial points constitutes the shortest distance on the earth's surface between them

Examples of great circle in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The currents created by this great circle, as well as the temperature differences between water layers, result in an effective mechanism for getting heat and carbon dioxide out of the atmosphere and into the deep ocean via downwelling currents. Alka Tripathy-Lang, Ars Technica, 21 June 2023 Scientists say there are great circle routes around the moon that avoid changing elevation, for example. Caroline Delbert, Popular Mechanics, 29 Dec. 2021 On a hyperbolic surface, some geodesics are infinitely long, like straight lines in the plane, but others close up into a loop, like the great circles on a sphere. Quanta Magazine, 12 Aug. 2014 Initially, the researchers tried to brute force the answer by examining every possible great circle on the planet. David Shultz, Science | AAAS, 30 Apr. 2018 Its memorial, at Lands End, stands on the great circle route from San Francisco to Guadalcanal. Gary Kamiya, San Francisco Chronicle, 9 June 2018 All straight-line paths along a sphere form a shape called a great circle. David Shultz, Science | AAAS, 30 Apr. 2018

Word History

First Known Use

circa 1530, in the meaning defined above

Time Traveler
The first known use of great circle was circa 1530

Dictionary Entries Near great circle

Cite this Entry

“Great circle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/great%20circle. Accessed 26 Dec. 2024.

Kids Definition

great circle

noun
: a circle on the surface of a sphere that has the same center as the sphere
especially : one on the surface of the earth a portion of which is the shortest travel distance between two points

More from Merriam-Webster on great circle

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!