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Entry 1 sense Webster, 1913

space sickness

· space· sick·ness · IPA
01 n. a group of symptoms, prominently nausea, but sometimes including lethargy, headache, and sweating, occuring under the weightless conditions…
  1. 1.
    a group of symptoms, prominently nausea, but sometimes including lethargy, headache, and sweating, occuring under the weightless conditions of space flight.