geosynchronous

adjective

geo·​syn·​chro·​nous ˌjē-ō-ˈsiŋ-krə-nəs How to pronounce geosynchronous (audio)
-ˈsin-
: being or having an orbit around the earth with a period equal to one sidereal day
specifically : geostationary

Examples of geosynchronous 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 first-stage booster made a successful 21st liftoff, but was expended to get the satellite to a geosynchronous transfer orbit. Richard Tribou, The Orlando Sentinel, 18 Aug. 2025 The Vulcan rocket's Centaur upper stage released its payloads into geosynchronous orbit more than 22,000 miles (nearly 36,000 kilometers) over the equator roughly seven hours after liftoff. Jonathan M. Gitlin, ArsTechnica, 15 Aug. 2025 These vehicles can collectively reach orbits including medium Earth orbit and geosynchronous orbit, or faraway destinations such as the moon, Mars or asteroids. Elizabeth Howell, Space.com, 15 Aug. 2025 The spacecraft separation took place roughly seven hours after the rocket lifted into geosynchronous Earth orbit, according to the Space Force. Filip Timotija, The Hill, 13 Aug. 2025 See All Example Sentences for geosynchronous

Word History

First Known Use

1968, in the meaning defined above

Time Traveler
The first known use of geosynchronous was in 1968

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Cite this Entry

“Geosynchronous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geosynchronous. Accessed 5 Sep. 2025.

Last Updated: - Updated example sentences
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