'''Scd''' or '''SCD''' may refer to:
==In medicine==
* Salicylate decarboxylase, an enzyme * Schnyder crystalline corneal dystrophy, an eye disease * Scrupulous–compulsive disorder, a mental disorder * Sequential compression device, to improve blood flow * Sickle-cell disease, a blood disease * Specific carbohydrate diet * Stearoyl-CoA desaturase-1, an enzyme * Sudden cardiac death * Superior canal dehiscence, of the inner ear
==In engineering and information technology== * System context diagram * {{mono|/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 * Special category data, sensitive data as defined by the GDPR
==Other uses== * {{lang|pt|Satélite de Coleta de Dados}}, Brazilian satellites SCD-1 and SCD-2 * Sc.D., Doctor of Science degree * Scottish country dance * Senior College {{lang|ga|Dún Laoghaire|italic=no|nocat=y}}, now Blackrock Further Education Institute, Ireland * Service-Connected Discharge a category of discharge from the United States Army * Social communication disorder, a language disorder * Sonic CD * Specialist Crime Directorate (Metropolitan Police), London, former branch * ''Sports Collectors Digest'', a publication * St. Cloud station, Minnesota, U.S., Amtrak code * ''Strictly Come Dancing'', a British TV show * Sylacauga Municipal Airport, Alabama, US, FAA identifier * Syrian Civil Defense or the ''White Helmets'', a volunteer organisation
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