What is another word for north-south direction?
Pronunciation: [nˈɔːθsˈa͡ʊθ da͡ɪɹˈɛkʃən] (IPA) 
There are quite a few synonyms for the term "north-south direction." Some of the most common are "polar axis," "meridian," and "compass line." Other possible synonyms include "longitude direction," "vertical axis," and "zenith-nadir line." Each of these terms refers to the same basic concept of a directional axis that runs from north to south. Depending on the context in which it is used, one synonym may be seen as more appropriate or precise than another. However, all of these terms ultimately refer to the same directional orientation, and can be used interchangeably in many situations.
