Webster's New World Medical Dictionary

high colonics
See 
irrigation of the colon.
hip bursitis
See 
bursitis, hip.
heteroploid
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hip pointer
A bruise of the upper edge of the
ilium, one of the hip bones. This injury is typically
caused by a direct blow or fall and is most common
in those playing contact sports. Also known as iliac
crest contusion.
hippocampus
An area deep in the forebrain that
helps regulate emotion, learning, and memory.
Hippocratic Oath
An oath taken by new physi-
cians authored by Hippocrates. The oath represents
a promise to act ethically: to treat the ill to the best
of one’s ability, to preserve a patient’s privacy, to
teach the secrets of medicine to the next generation,
and so on. See also 
Daily Prayer of a Physician.
Hirschsprung’s disease
An abnormal condition
that is present at birth and is due to absence of the
normal nerves (ganglia) in the bowel wall. Nerves
can be missing starting at the anus and extending up
a variable distance of the bowel. This results in
enlargement of the bowel above the point of the
missing nerve, as the nerves normally assist in
the natural movement of the muscles in the lining
of the bowels to move bowel contents through.
Hirschsprung’s disease is the most common cause
of lower intestinal blockage in newborns. The 
symptoms are vomiting, constipation, distention of
the abdomen, and intestinal obstruction.
Hirschsprung’s disease is a feature of a number of
syndromes but can also occur in isolation.
Treatment is surgery. Also known as congenital
aganglionic megacolon or congenital megacolon.