Webster's New World Medical Dictionary

endemic typhus
See 
typhus, murine.
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endemic typhus
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endocardium
The lining of the interior surface
of the heart chambers. The endocardium consists of
a layer of endothelial cells and an underlying layer
of connective tissue.
endocervical curettage
The removal of tissue
from the inside of the cervix, using a spoon-shaped
instrument called a curette.
endocrine
Pertaining to hormones and the
glands that make and secrete them into the blood-
stream through which they travel to affect distant
organs. See also 
endocrinology; endocrinopathy.
endocrinology
The study of the medical aspects
of hormones, including diseases and conditions
associated with hormonal imbalance, damage to the
glands that make hormones, or the use of synthetic
or natural hormonal drugs. An endocrinologist is a
physician who specializes in the management of
hormone conditions.
endocrinopathy
A disease of an endocrine
gland. The term endocrinopathy is commonly used
as a medical term for a hormone problem. Common
endocrinopathies include hyperthyroidism and
hypothyroidism.
endoderm
The innermost of the three primary
germ cell layers (the other two being the mesoderm
and ectoderm) that make up the very early embryo.
It differentiates to give rise first to the embryonic gut
and then to the linings of the respiratory and diges-
tive tracts and the liver and pancreas. Also referred
to as entoderm. See also 
differentiation; ecto-
derm; embryo; mesoderm.
endogenous
Originating from inside an organ-
ism. For example, endogenous cholesterol is cho-
lesterol that is made inside the body, not derived
from the diet. See also 
exogenous.