Meaning: A coral reef off the southern coast of Florida. Classified under: Nouns denoting natural objects (not man-made) Synonyms: cay; Florida key; key. Hypernyms (cay is a kind of...): coral reef (a reef consisting of coral consolidated into limestone) Holonyms (cay is a part of...):
Causes. Fever occurs when an area in your brain called the hypothalamus (hi-poe-THAL-uh-muhs) â also known as your body's thermostat â shifts the set point of your normal body temperature upward.
Knowing When to Go to the Doctor. 1  1. Recognize the symptoms of a fever. Not everyoneâs normal body temperature is exactly 98.6 Â°F (37.0 Â°C). 2  2. Call the doctor if the fever is high. Adults should go to the doctor with a fever higher than 103 Â°F (39 Â°C). 3  3. Call the doctor if the fever lasts more than a few days.