Webster's New World Medical Dictionary

sty
See 
stye.
stye
A red, tender bump on the eyelid that is
caused by an acute infection of the oil glands of the
eyelid. The medical term for a stye is hordeolum.
subacute
Rather recent onset or somewhat rapid
change. In contrast, acute indicates very sudden
onset or rapid change, and chronic indicates indef-
inite duration or virtually no change.
Streptococcus faecalis
404
20_189283 ch19.qxp 4/18/08 10:18 PM Page 404
http://www.rashidislamiccenter.com
http://www.allofislam.com/

---

subacute sclerosing panencephalitis
A
chronic brain disease of children and adolescents
that occurs months to often years after an attack of
measles and causes convulsions, motor abnormali-
ties, mental retardation, and usually death.
Abbreviated SSPE.
subaortic stenosis
Narrowing of the left ventri-
cle of the heart, just below the aortic valve, through
which blood must pass on its way up into the aorta.
The narrowing restricts the flow of blood. Subaortic
stenosis may be present at birth (congenital) or
acquired as part of a specific form of heart disease
known as idiopathic hypertrophic subaortic steno-
sis (IHSS). Treatment options include use of drugs
and surgery. See also 
idiopathic hypertrophic
subaortic stenosis.
subarachnoid
Literally, beneath the arachnoid,
the middle of three membranes that cover the cen-
tral nervous system. In practice, subarachnoid usu-
ally refers to the space between the arachnoid and
the pia mater, the innermost membrane surround-
ing the central nervous system. It normally contains
cerebrospinal fluid. See also 
cerebrospinal fluid.
subarachnoid hemorrhage
A bleeding into the
subarachnoid, the space between the arachnoid and
the pia mater, the innermost membrane surround-
ing the central nervous system. Subarachnoid hem-
orrhage typically occurs when an artery breaks
open in the brain, such as from a ruptured
aneurysm. This can require emergency neurosurgi-
cal procedures.