Syringomyelia (SM) is a disease in which there is a syrinx, or cyst, in the spinal cord. The syrinx is filled with cerebrospinal fluid (CSF). Due to normal activities like coughing and straining, SM cavities can slowly become larger over a period of time, often years.
Freebase(0.00 / 0 votes)Rate this definition: Darien. Darien is a town in Fairfield County, Connecticut, United States. A relatively small community on Connecticut's Gold Coast, the population was 20,732 at the 2010 census. Darien was listed at #9 on CNN Money's list of top-earning towns in the United States as of 2011.
Darien is bordered on the west by Stamford, on the north by New Canaan, and on the east by Norwalk. On the south it faces Long Island Sound. It is part of the panhandle of Connecticut jutting into New York state. The town has 16.5 miles (26.6 km) of coastline and five harbors.