/ ˌvaɪs ˈvɜːsə; ˌvaɪsi; NAmE ˈvɜːrsə/ adverb
used to say that the opposite of what you have just said is also true :
You can cruise from Cairo to Aswan or vice versa (= also from Aswan to Cairo) .
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WORD ORIGIN
early 17th cent.: from Latin , literally in-turned position .