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.
A fever is an increase in your body temperature. Normal body temperature is 98.6Â°F (37Â°C). Fever is generally defined as greater than 100.4Â°F (38Â°C). The cause of your fever may not be known. This is called fever of unknown origin. It occurs when you have a fever above 100.9ËF (38.3Â°C) for 3 weeks or more. The following are common causes of fever: An infection caused by a virus or bacteria. An inflammatory disorder, such as arthritis. A brain infection or injury.