nausea

nausea /nau·sea/ (naw´ze-ah) an unpleasant sensation vaguely referred to the epigastrium and abdomen, with a tendency to vomit.

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nausea gravida´rum  the morning sickness of pregnancy.

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nau·se·a (nôz-, -zh, -s-, -sh)

n.

A feeling of sickness characterized by gastrointestinal distress and an urge to vomit.

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nausea,

n an unpleasant gastroin-testinal sensation, sometimes accompanied by dizziness and vomiting.

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nausea (nôz´ē),

n a sensation often leading to the urge to vomit. Common causes are motion sickness, early pregnancy, intense pain, emotional stress, gallbladder disease, food poisoning, and various enteroviruses. It is also the most common side effect of poorly administered nitrous oxide.

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nausea

a subjective sensation in humans which probably occurs in animals. It is an unpleasant sensation, vaguely referred to the epigastrium and abdomen, with a tendency to vomit. Nausea may be a symptom of a variety of disorders, some minor and some more serious.

Nausea is usually felt when nerve endings in the stomach and other parts of the body are irritated, e.g in motion sickness. The irritated nerves send messages to the center in the brain that controls the vomiting reflex. When the nerve irritation becomes intense, vomiting results.