AAD may refer to:

Organizations

* ''Ad Altare Dei'', a Boy Scouts of America award * Advanced Automotive Design, a South African car manufacturer * Ardent Leisure, an Australian-based leisure company * AAD Education, Health and Sports (formerly, Athletes Against Drugs), an organization founded by Stedman Graham *

American Academy of Dermatology The American Academy of Dermatology (AAD) is a non-profit professional organization of dermatologists in the United States and Canada, based in Rosemont, Illinois, near Chicago. It was founded in 1938 and has more than 20,500 members. The Academy ...

Australian Antarctic Division The Australian Antarctic Division (AAD) is a division of the Department of Climate Change, Energy, the Environment and Water. The Division undertakes science programs and research projects to contribute to an understanding of Antarctica and th ...

, which manages Australia's four Antarctic/sub-Antarctic stations, as well as Heard Island

Science and technology

* Average absolute deviation, a measure of

absolute deviation In mathematics and statistics, deviation is a measure of difference between the observed value of a variable and some other value, often that variable's mean. The sign of the deviation reports the direction of that difference (the deviation is po ...

and a way to report error against reference data in statistics * Advanced Air defence, an anti-ballistic missile in the

Indian Ballistic Missile Defence Programme The Indian Ballistic Missile Defence Program is an initiative to develop and deploy a multi-layered ballistic missile defence system to protect India from ballistic missile attacks. It was launched in 2000 after Kargil War by the Atal Bihari Vaj ...

Aviation

* Automatic activation device, a fail-safe device often used in a parachute pack * Adado Airport, airport serving Adado, Somalia (IATA code: AAD)

Computing

* aad, or "ASCII Adjust before Division", an Intel BCD opcode * AAD, the SPARS code for a CD that was recorded analog, mixed analog, and transferred digitally * Additional Authenticated Data passed to an "Authenticated Encryption with Associated Data" ( AEAD) block cipher mode of operation * Microsoft Azure active directory

Medicine

* Antibiotic-associated diarrhea *

7-Aminoactinomycin D 7-Aminoactinomycin D (7-AAD) is a fluorescent chemical compound with a strong affinity for DNA. It is used as a fluorescent marker for DNA in fluorescence microscopy and flow cytometry. It intercalates in double-stranded DNA, with a high aff ...

(7-AAD), a fluorescent stain for DNA * Acute aortic dissection, a type of

Aortic dissection Aortic dissection (AD) occurs when an injury to the innermost layer of the aorta allows blood to flow between the layers of the aortic wall, forcing the layers apart. In most cases, this is associated with a sudden onset of severe chest or ...

* Antiarrhythmic drug, another name for

antiarrhythmic agent Antiarrhythmic agents, also known as cardiac dysrhythmia medications, are a group of pharmaceuticals that are used to suppress abnormally fast rhythms ( tachycardias), such as atrial fibrillation, supraventricular tachycardia and ventricular t ...

Other uses