nausea is a topic covered in the Taber's Medical Dictionary.

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(naw′sē-ă, naw-zē-ă )

[Gr. nausia, seasickness]
An unpleasant, queasy, or wavelike sensation in the back of the throat, epigastrium, or abdomen that may or may not lead to the urge or need to vomit.
SEE: Nursing Diagnoses Appendix

Any materials or environmental factors that precipitate the nausea should be removed. Frequency, time, amount, and characteristics of nausea-associated emesis are noted. Vomitus is tested for blood when indicated. Oral hygiene and comfort measures are provided. If nausea persists, professional evaluation may be advisable.

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