Webster's New World Medical Dictionary

Great Plague
The typhus outbreak that swept
London in 1665. See also 
bubonic plague; typhus,
epidemic.
great saphenous vein
The larger of the two
saphenous veins, the principal veins that run up the
leg near the surface. The great saphenous vein goes
from the foot all the way up to the saphenous open-
ing, an oval aperture in the broad fascia of the thigh.
The vein then passes through this fibrous mem-
brane. Also known as large saphenous vein.
green tea
A tea brewed from fresh leaves from
the 
Camellia sinensis
plant used in traditional
Chinese and Indian medicine. Green tea contains a
high concentration of powerful antioxidants called
polyphenols. Laboratory studies suggest that green
tea may help protect against or slow the growth of
certain cancers, but studies in humans have shown
mixed results. Some studies have also shown that
green tea may help lower blood cholesterol levels
and have a protective effect against other diseases
ranging from diabetes to liver disease. Extracts of
green tea leaves are also available as capsules and
liquid preparations. The scientific or medical bene-
fits of green tea have not been firmly established,
and green tea may have harmful interactions with
certain prescription medications.
greenstick fracture
See 
fracture, greenstick.
groin
The area where the thigh meets the hip.
gross anatomy
See 
anatomy, gross.
gross hematuria
See 
hematuria, gross.
Group A strep
See 
streptococcus pyogenes.
Group B strep
See 
streptococcus, group B.
group therapy 1
A type of psychiatric care in
which several patients meet with one or more thera-
pists at the same time. Patients form a support group
for each other, and they receive expert care and
advice. The group therapy model is particularly
appropriate for psychiatric illnesses that are support
intensive, such as anxiety disorders, but is not well
suited for treatment of some other psychiatric disor-
ders, such as schizophrenia.
2
A type of psycho-
analysis in which patients analyze each other, with
the assistance of one or more psychotherapists, as in
an “encounter group.” See also 
gestalt therapy.