Noun nausea has 2 senses
  1. nausea, sickness - the state that precedes vomiting
    --1 is a kind of symptom
    --1 has particulars:
     motion sickness, kinetosis; morning sickness; queasiness, squeamishness, qualm
    Derived form: verb nauseate1
  2. nausea - disgust so strong it makes you feel sick
    --2 is a kind of
    Derived forms: verb nauseate1, verb nauseate2