Webster's New World Medical Dictionary

pelvis, android
See 
male pelvis.
pelvis, female
See 
female pelvis.
pelvis, gynecoid
See 
female pelvis.
pelvis, male
See 
male pelvis.
Pendred syndrome
A genetic disease that is
characterized by congenital deafness, abnormalities
of the inner ear, and goiter. Pendred syndrome
is inherited in an autosomal recessive manner and
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Pendred syndrome
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is caused by mutations in the gene known as
SLC26A4 (also referred to as the PDS gene) on
chromosome 7. Also known as deafness with goiter,
goiter-deafness syndrome, and thyroid hormone
organification defect IIb.
penetrance
The likelihood that a given gene will
result in disease. 
penicillin
Historically the most famous of antibi-
otics, which kills many bacteria and some other
microorganisms by attacking and destroying their
cell walls. Penicillin is not effective against viruses,
however, and specific penicillin types may be
needed for certain bacteria. The different varieties
of penicillin include amoxicillin, ampicillin,
bacampicillin, carbenicillin, cloxicillin, dicloxi-
cillin, nafcillin, oxacillin, penicillin G, and penicillin
V. See also 
antibiotic.
penicillin
-
resistant bacterium
A bacterium
that is unaffected by penicillin. The rise of penicillin-
resistant bacteria is due to overuse of penicillin
drugs, including their ineffective but nonetheless fre-
quent use against colds and viral infections.
penile
Of or pertaining to the penis.
penis
The external male sex organ. The penis
contains two chambers, the corpora cavernosa,
which run the length of the organ. These chambers
are filled with spongy tissue and surrounded by a
membrane called the tunica albuginea. The spongy
tissue contains smooth muscles, fibrous tissues,
spaces, veins, and arteries. The urethra, which is the
channel for urine and ejaculate, runs along the
underside of the corpora cavernosa. The urethra
emerges at the glans, the rounded tip of the penis.