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.
Rather recent onset or somewhat rapid change. In contrast, acute indicates very sudden onset or rapid change, and chronic indicates indefinite duration or virtually no change.
- Subacute sclerosing panencephalitis (SSPE)
A chronic brain disease of children and adolescents that occurs months to often years after an attack of measles, causing convulsions, motor abnormalities, mental retardation and, usually, death.
- Subacute spongiform encephalopathy
- Subaortic stenosis
Narrowing of the left ventricle of the heart just below the aortic valve through which blood must pass on its way up into the aorta. The narrowing cuts the flow of blood. Subaortic stenosis may be congenital (present at birth) or acquired as part of a particular form of heart disease known as “idiopathic hypertrophic […]
Literally, beneath the arachnoid, the middle of three membranes that cover the central nervous system. In practice, subarachnoid usually refers to the space between the arachnoid and the pia mater, the innermost membrane surrounding the central nervous system. The subarachnoid space is a potential space. It normally contains cerebrospinal fluid. A subarachnoid hemorrhage is a […]