the prime meridian
noun
: an imaginary line that runs from the North Pole to the South Pole through Greenwich, England
Examples of the prime meridian in a Sentence
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For example, consider the prime meridian, which passes through Greenwich, England, at longitude zero.
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Steve Nadis, Quanta Magazine, 31 May 2024
Like the prime meridian, the event horizon is an illusion: a mathematical artifact called a coordinate singularity, which only arises because of the choice of coordinates.
—Steve Nadis, Quanta Magazine, 31 May 2024
The actual point where the prime meridian hits the Equator is in the Atlantic Ocean.
—Emefa Addo Agawu, New York Times, 23 Mar. 2024
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Steve Nadis, Quanta Magazine, 31 May 2024
Like the prime meridian, the event horizon is an illusion: a mathematical artifact called a coordinate singularity, which only arises because of the choice of coordinates.
—Steve Nadis, Quanta Magazine, 31 May 2024
The actual point where the prime meridian hits the Equator is in the Atlantic Ocean.
—Emefa Addo Agawu, New York Times, 23 Mar. 2024
Cite this Entry
“The prime meridian.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/the%20prime%20meridian. Accessed 18 May. 2025.
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