Webster's New World Medical Dictionary

fever, trench
See 
trench fever.
fever, undulant
See 
Brucellosis.
fever blister
See 
canker sore.
fever of unknown origin
The presence of fever
greater than 38.3°C (101°F) “off and on” for more
than three weeks without a specific cause identified
for the fever. Abbreviated FUO. Extensive diagnostic
testing can determine the cause in the majority of
cases of FUO. FUO may be related to infections such
as HIV or other viral infections, cancers, or chronic
inflammatory diseases such as sarcoidosis.
fever therapy
A treatment in which abnormal ele-
vations in body temperature are used to treat disease.
Fever therapy was done in the past but is rarely, if
ever, used today.
fever with renal syndrome, hemorrhagic
See
hemorrhagic fever, viral.
FGF
Fibroblast growth factor.
fiber
The parts of fruits and vegetables that can-
not be digested. Fiber is of vital importance to diges-
tion; it helps the body move food through the
digestive tract, reduces serum cholesterol, and con-
tributes to disease protection. Also known as bulk
and roughage.
fiber, bowel disorders and
High-fiber diets
help delay the progression of diverticulosis and, at
least, reduce the number of bouts of diverticulitis.
In many cases, fiber helps reduce the symptoms of
irritable bowel syndrome and constipation.
fiber, cholesterol and
Cholesterol blood levels
can be influenced by intake of fiber. Soluble fiber
substances are effective in helping reduce the level
of blood cholesterol.
fiber, constipation and
Constipation can be
influenced by intake of fiber. Insoluble fiber retains
water in the colon, resulting in softer and larger