Scd or SCD may refer to:
In medicine
- Salicylate decarboxylase, an enzyme
- Schnyder crystalline corneal dystrophy, an eye disease
- Sequential compression device, an inflatable sleeve to improve blood flow
- Sickle-cell disease, a blood disease
- Specific Carbohydrate Diet, with limited complex carbohydrates
- Stearoyl-CoA desaturase-1, an enzyme involved in fatty acid metabolism
- Subacute combined degeneration, a neurodegenerative disorder caused by vitamin B12 deficiency
- Sudden cardiac death
- Superior canal dehiscence, a medical condition of the inner ear
In engineering and information technology
- System context diagram
- /dev/scd, SCSI audio-oriented optical disk drives
- Slowly changing dimension, a datawarehousing term for data that changes slowly
- The Scientific Computing Division of the National Center for Atmospheric Research
- Substation Configuration Description for electrical substations
Other uses
- Santa Clarita Diet, an American horror-comedy web television series on Netflix
- Satélite de Coleta de Dados, Brazilian satellites abbreviated SCD-1 and SCD-2
- Sc.D., university degree of Doctor of Science
- Scottish country dance, a form of social dance involving groups of couples of dancers tracing progressive patterns
- Senior College Dún Laoghaire, an Irish further education institution, now known as Blackrock Further Education Institute
- Specialist Crime Directorate (Metropolitan Police), London, former branch
- Sports Collectors Digest, sports memorabilia publication
- St. Cloud station, an Amtrack railway station in Minnesota, U.S.
- Strictly Come Dancing, a British celebrity dancing competition
- Sustainable community development
- Sylacauga Municipal Airport, Alabama, FAA identifier
SCD; ICAO identifierKSCD - Syrian Civil Defense, a NGO that operates in rebel-controlled Syria during the Syrian Civil War, also known as the White Helmets