Webster's New World Medical Dictionary

bariatrician
A physician who specializes in
bariatrics. See 
bariatrics.
bariatrics
The field of medicine that focuses on
persons who are overweight using a comprehensive
program including diet and nutrition, exercise,
behavior modification, lifestyle changes, and, when
indicated, the prescription of appetite suppressants
and other appropriate medications. Bariatrics also
includes research into overweight, as well as its
causes, prevention, and treatment. See also
bariatric surgery.
barium enema
An enema using a white, chalky
solution containing barium, in preparation for
series of X-ray images of the lower intestine
(colon). The barium outlines the colon on the X-ray
film.
bacteriostatic
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barium solution
A liquid that contains barium
sulfate, which produces a visible image on X-ray
film. Barium solution outlines organs of the body so
they can be seen as images on X-ray film.
barium sulfate
An odorless, flavorless barium
salt. Barium is a metallic chemical element. See also
barium enema; barium solution; barium swallow.
barium swallow
A test that involves filling the
esophagus, stomach, and small intestines with a
barium solution in preparation for an X-ray, to
define the anatomy of the upper digestive tract. Also
known as upper gastrointestinal series.
barosinusitis
See 
aerosinusitis.
barotitis
See 
aerotitis.
Barr body
A microscopic feature of female cells
that is due to the presence of two X chromosomes,
one of which is inactive and crumples up.