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There is no particular name for that event. It was decided long ago that since every parallel of latitude crosses each of the infinite number of meridians, and that every meridian of longitude crosses each of the infinite number of latitudes, it would be cruel to expect students, even gifted ones, to learn all of those names.
Lines of latitude are horizontal and run parallel to the poles
A Parallel of Latitude
Parallel: 0o latitude
Every meridian of longitude is perpendicular to every parallel of latitude, and every parallel of latitude is perpendicular to every meridian of longitude.