There are multiple definitions:

1. acetylsalicylic acid(English)

   • aka aspirin
   • Preventive medicine, Pharmacology / pharmaceutics, Pain

2. atrial septal aneurysm(English)

   • Cardiology, Pathology

3. aspartate semialdehyde(English)

4. American Stroke Association(English)

   • on average, someone in the U.S. dies of stroke every 3 minutes and 11 seconds. Nearly 47% of U.S. adults are estimated to have hypertension. Stroke accounts for 17.5% of total cardiovascular disease deaths. Stroke deaths in the U.S. increased by 28.7% between 2012 and 2022
   • AHA, CVA, ESO, WSO
   • Cerebrovascular event, Organizations (documentation)
   • https://www.stroke.org/en/

5. American Society of Anesthesiologists(English)

   • see their pre-operative physical status classification system
   • SRS-22r
   • Anesthesiology/analgesia, Classification, Organizations (scientific)
   • https://www.asahq.org/
   • https://www.asa…fication-system
   • https://doi.org…6.5.SPINE151428

6. Australasian Sleep Association(English)

   • Sleep medicine, Organizations (clinical)
   • https://www.sleep.org.au//

7. American Standards Association(English)

   • Standards, Organizations (documentation)
   • https://en.wiki…dards_Institute

8. anti-sperm antibody(English)

   • Immunology, Andrology, Embryology /reproduction

9. American Surgical Association(English)

   • Surgery, Organizations (clinical)

10. American Statistical Association(English)

    • Statistics, Organizations (scientific)

11. alcohol septal ablation(English)

    • used for treatment of medically refractory hypertrophic obstructive cardiomyopathy patients with severe left ventricular outflow tract (LVOT) obstruction
    • LVOT, HCM, SRT
    • Cardiology, Alcohol, Therapeutic approaches
    • https://doi.org…IONS.115.002675
    • https://doi.org…acc.2023.11.013

12. anterior septal angle(English)

    • refers to dorsal reconstruction in primary rhinoplasty after cartilage dorsum excision
    • ECS, NOSE, SDA, ULC
    • ENT, Surgery
    • https://doi.org…0266-010-9641-4

13. authorized shared access(English)

    • Communication
    • https://doi.org…OC.2014.2298437

14. all-soft suture anchor(English)

    • refers to medial patellofemoral ligament reconstruction
    • ACL, MPFL, SA
    • Orthopedics, Sports medicine, Biophysics
    • https://doi.org…363546517691951

15. atrial short-axis area(English)

    • LVEDP, VSA
    • Cardiology, Medical imaging
    • https://doi.org….1038/srep43505

16. azimuth angle spread of arrival(English)

    • 3GPP, 5G NR, ACLR, ACS, ASD, CLI, DL, DPD, FD, FDD, FTP3, gNB, gNB-RU, HD, IBFD, JCS, LNA, LOS, MCL, MCS, MIMO, PA, PSD, RB, RU, SBFD, SI, TDD, UE, UL, UMa, UPT, ZOD, ZSA, ZSD
    • Communication
    • https://doi.org…OC.2024.3419158

17. antisarcolemmal antibody(English)

    • autoantibody that targets the sarcolemma, the membrane surrounding muscle fiber cells. Primarily linked to cardiomyocyte destruction and heart diseases, they act as diagnostic markers in myocarditis, dilated cardiomyopathy, and infective endocarditis, often leading to lymphocyte-mediated cytotoxicity
    • AFA, AEA, ANA, CMV, IE, IFA, SMA
    • Immunology, Cardiology, Clinical chemistry, Membranes
    • https://doi.org…8703(83)90200-4