Webster's New World Medical Dictionary

gingiva
The gums.
gingivitis
Gum disease with inflammation of the
gums. The gums appear red and puffy and usually
bleed during tooth-brushing or dental examination.
Treatment involves improved cleaning. Antiseptic
mouthwashes may also be recommended. See also
acute membranous gingivitis; gum disease.
GIST
Gastrointestinal stromal tumor.
gland
A group of cells that secrete a substance for
use in the body. For example, the thyroid gland.
gland, mammary
One of the glands within the
breast that secretes milk when prompted to do so by
special hormones. The mammary glands become
enlarged when they are engorged with milk. See
also 
mastitis.
gland, Meibomian
One of the small glands in
the eyelids that make a lubricant called sebum that
is discharged through tiny openings in the edges of
the lids. The Meibomian glands can become
inflamed, a condition termed meibomianitis or mei-
bomitis. Chronic inflammation leads to cysts of the
Meibomian glands, called chalazions. Also known
as the palpebral gland, tarsal gland, and tarsocon-
junctival gland. See also 
cyst, Meibomian; sebum.
gland, palpebral
See 
gland, Meibomian.
gland, parotid
See 
parotid gland.
gland, prostate
A gland in the male reproduc-
tive system that is located just below the bladder.
The prostate gland surrounds part of the urethra,
the canal that empties the bladder. The prostate is
composed of glandular tissue and bundles of
smooth muscle. The prostate gland secretes a milky
fluid that is discharged into the urethra at the time
of ejaculation of semen and is part of semen. See
also 
prostate enlargement; prostatitis.
gland, sebaceous
One of the skin glands that
empty an oily secretion called sebum into the hair
follicles near the surface of the skin. Sebum helps 
to keep skin moist and protected. See also 
cyst,
sebaceous.