The difference between Fever and Pyrexia
When used as nouns, fever means a higher than normal body temperature of a person (or, generally, a mammal), usually caused by disease, whereas pyrexia means fever.
Fever is also verb with the meaning: to put into a fever.
check bellow for the other definitions of Fever and Pyrexia
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Fever as a noun:
A higher than normal body temperature of a person (or, generally, a mammal), usually caused by disease.
Examples:
"I have a fever. I think I've the flu."
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Fever as a noun (usually, in combination with one or more preceding words):
Any of various diseases.
Examples:
"[[scarlet fever]]"
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Fever as a noun:
A state of excitement or anxiety.
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Fever as a noun:
A group of stingrays.
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Fever as a verb:
To put into a fever; to affect with fever.
Examples:
"a fevered lip"
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Fever as a verb:
To become fevered.
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Pyrexia as a noun (medicine):
Fever.