There are multiple definitions:

1. airway-breathing-circulation(English)

   • ABCD, ABCDE
   • Emergency medicine

2. Ambulant Behandel Centrum(Dutch)

   • Patient care

3. ATP Binding Cassette(English)

   • integral membrane protein that uses energy gained from hydrolyzing ATP
   • CAT1/3, ABCA1, ABCR, ATP, NBD, TMD, ASCT1, BBB, CAT1, CBF, CCM, CNS, CSF, CTL1, EAAT2, GAT1, GLUT4, ISF, JAM-3, LPC, LRP1, MCT1, MPTP, PSA, RAGE, SMVT, TJ
   • Membranes
   • https://doi.org…science.1145950
   • https://doi.org…ull.2020.03.018

4. Anti-Bont-Comité(Dutch)

   • Animal welfare

5. absorbing boundary condition(English)

6. Atomic, Biological and Chemical(English)

   • BWC, NBC
   • Safety and health, Military medicine

7. advanced bladder cancer(English)

   • Oncology, Urology

8. avidin/biotin[ylated enzyme] complex(English)

   • ED-EGFR, EGF, EGFR, FLI, GAPDH, IHC, RTK, TC, 7-AAD, ABTS, ALT, AST, ATC, BAD, BCA, BUN, CMMI, DAB, DAPI, ECACC, ECL
   • Enzymes, Biochemistry, Pharmacology / pharmaceutics, Thyroid and parathyroid
   • https://doi.org…bcp.2025.117448

9. Autism Behavior Checklist(English)

   • CARS, ASD
   • Psychology, Behavior(al science)

10. age, biomarkers, clinical history(English)

    • elements to assess CVA risk score in AF
    • CVA, AF, ABC-ACS
    • Scoring systems/scales, Cardiology, Biomarker, Risk factor, Mnemonic
    • https://doi.org…urheartj/ehw210

11. Association of Black Cardiologists(English)

    • Cardiology, Organizations (clinical), Ethnicity
    • http://abcardio.org/

12. active breathing control(English)

    • to reduce the margin for breathing motion
    • DIBH
    • Radiotherapy /radiation, Respiratory system
    • https://www.uhn…ator_Device.pdf

13. aneurysmal bone cyst(English)

    • benign, vascular and cystic bony tumors which can be rapidly expanding and locally cause destruction of the surrounding tissue
    • JOF
    • Pediatrics, Vascular disease
    • https://dx.doi.…91.ijcp20214171
    • https://doi.org…55/2022/1608015

14. Aberrant Behavior Checklist(English)

    • an informant rating instrument empirically derived by principal component analysis
    • PCA, ASD, DD, DBD, NCBRF-CP
    • Behavior(al science)
    • https://doi.org…419-1698-3_1632
    • https://doi.org…8.CD008559.pub2

15. Aristotle Basic Complexity(English)

    • score that is calculated on 15 points and is determined from the primary procedure of any operation
    • Surgery, Scoring systems/scales, Congenital disorders, Cardiology
    • https://doi.org…-4471-6587-3_27

16. activity-specific balance confidence [scale](English)

    • refers to association of orthostatic hypotension (OH) with functional position change and balance in older adults with hypertension
    • HTN, OH, TUG, FES, GFFM
    • Scoring systems/scales, Aging, Gerontology/Geriatrics
    • https://doi.org….3920/CEP210016
    • https://doi.org…erona/50a.1.m28

17. autologous blood clot(English)

    • in highly myopic eye
    • BCVA, ILMR, MH, MHRD
    • Ophthalmology
    • https://doi.org…tha.2015.05.040

18. aging and body composition(English)

    • HF, PWV, cfPWV, Health ABC
    • Aging, Cardiology, Clinical trials, Risk factor
    • https://doi.org…ONAHA.116.08327

19. advanced breast cancer(English)

    • LYG, CDK 4/6, QALY
    • Oncology, Mammary gland
    • https://doi.org…47/CEOR.S178934

20. Atrial fibrillation Better Care(English)

    • use of this consistent pathway is associated with fewer major adverse events in patients with atrial fibrillation who have multiple comorbidities, use of polypharmacy, and prior hospitalization
    • AF
    • Cardiology
    • https://doi.org…JAHA.119.014932

21. apical bud cell(English)

    • refers to odontogenic differentiation of human dental pulp stem cells induced by preameloblast-derived factors
    • dhDPSC, MDPC-23, PA-CM
    • Stem cell, Dentistry, Materials science
    • https://doi.org…als.2011.09.007

22. amputé bilateral de la cuisse(French)

    • Surgery

23. avidin–biotin complex(English)

    • HLsmc, MAP-2, FJB, FLsmc, NMDA, TBI, HLSMC
    • Brain (dys)function, Neuropathy
    • https://doi.org…2-19-08597.2002
    • https://doi.org…9/neu.2011.2207

24. Assessment of Burden of COPD(English)

    • refers to an evaluation tool covering five domains
    • COPD, GPE, HHD, QOL
    • Respiratory system, Pathology, Quality of life
    • https://doi.org…47/COPD.S219851

25. anterior body height compression(English)

    • IS, SSPI
    • Spine (or spinal cord), Medical imaging
    • https://doi.org…620X.96B4.33249

26. activity-by-contact(English)

    • a GWAS-related score
    • APL, BC, BMI, BP, CAD, CRE, eQTL, FTP, GWAS, LD, PLG, QTL, SMC
    • Genomics, Scoring systems/scales
    • https://doi.org…093/cvr/cvae161