principal meridian
noun
: any of the true geographical meridians established by authority of the surveyor general of the U.S. that serves as the meridian of reference for subdividing public lands in a given region compare guide meridian
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“Principal meridian.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/principal%20meridian. Accessed 23 Nov. 2024.
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