The union of two meridians of longitude separated by $180^\circ$ is a great circle. Is there a particular name for these great circles that pass through both poles?
A name for great circles that pass through both poles
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$\begingroup$
terminology
cartography
1 Answers
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The term polar great circle turns up in both mathematical texts (Geometry of Four Dimensions; Geometry of Lie Groups) and cartographic sites (gcmap.com: Great Circle Mapper).
Other ideas: vertical circle (an astronomical term); circle of longitude.
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0I think "polar great circle" sometimes means something like a flight's path from Chicago to Delhi over the Arctic Ocean, although it's not exactly a "polar great circle" in the sense used in your answer. – 2017-01-10
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0@MichaelHardy I've added two more suggestions. – 2017-01-10