motion sickness

noun
🔊/ˈməʊʃn sɪknəs/
🔊/ˈməʊʃn sɪknəs/
[uncountable]
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  1. the unpleasant feeling that you are going to vomit, that some people have when they are moving, especially in a vehicle运动病;晕动病(尤指晕车)