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Definition of sleeping sickness noun from the Oxford Advanced Learner's Dictionary

sleeping sickness

noun
 
/ˈsliːpɪŋ sɪknəs/
 
/ˈsliːpɪŋ sɪknəs/
[uncountable]
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  1. a tropical disease carried by the tsetse fly that causes a feeling of wanting to go to sleep and usually causes death
See sleeping sickness in the Oxford Advanced American Dictionary
trait
noun
 
 
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