SAD
Look up SAD in Wiktionary, the free dictionary.
The initialism SAD may refer to:
Medicine
- Sagittal abdominal diameter, body diameter at the waistline
- Schizoaffective disorder, a psychiatric diagnosis
- Seasonal affective disorder, typically winter depression
- Separation anxiety disorder in children
- Social anxiety disorder
Organisations
- Shiromani Akali Dal, a political party in India
- Sociedad Anónima Deportiva, a type of incorporated sports club in Spain
- Sociedade Anónima Desportiva, a type of incorporated sports club in Portugal
- Special Activities Division, of the US CIA, later Special Activities Center
- Saraya Awliya al-Dam, an Iraqi militia
Science and technology
- Selected area diffraction, a crystallographic experimental technique
- Single-wavelength anomalous dispersion, in X-ray crystallography
- Sum of absolute differences in digital image processing
Other uses
- Standard American Diet
- Single Administrative Document, EU customs form
- Singles Awareness Day, a humorous holiday every February 14
- Suicide Attack Database, for 1982-2013
- "S.A.D.", a song by Man Overboard on the album Heart Attack
- Safford Regional Airport, Arizona, US, IATA airport code