| Aβ | Amyloid-Beta |
| A.BETA | Amyloyd Beta |
| AA | Amino Acid |
| AA | Amyloid A |
| AA1RA | Adenosine A1 Receptor Antagonist |
| AAA | Abdominal Aortic Aneurysm |
| AAAS | American Association for the Advancement of Science |
| AAB | Anti Amyloid Beta (Alzheimers Disease) |
| AAC | Agriculturally Active Chemical |
| AACR | American Association of Cancer Research |
| AAD | American Association for Diabetes |
| AAI | Active Agricultural Ingredient |
| AAMI | Age Associated Memory Impairment |
| AAP | Alpha-1 Acid Phosphatase |
| AAP | Ascending Aortic Prosthesis |
| AAP Psychi | Atypical AntiPsychotic |
| AAPS | American Association of Pharmaceutical Scientists |
| AAT | Alpha-1-Anti Trypsin |
| AATD | Alpha-1 Anti Trypsin Deficiency |
| AAV | Adeno Associated Virus |
| AB | Anti Body |
| ABB | Asea Brown Boveri (CH) |
| ABCA-1 | ATP Binding Cassette Apolipoprotein A-1 (Protein - Cardiology) |
| ABDTPA | 1-(p-Amino Benzyl) Diethylene Triamine Pentaacetic Acid |
| ABE | Acetone Butanol Ethanol |
| ABECB | Acute Bacterial Exacerbations of Chronic Bronchitis |
| ABEPET | Associação Brasileira dos fabricantes de Embalagens de PET |
| ABH | Amino Borono Hexanoic acid [Erectile dysfunction treat.] |
| ABI | Active Biopharmaceutical Ingredient |
| ABI NeuroS | Acquired Brain Injury |
| ABS | Acrylonitrile Butadiene Styrene (terpolymer) |
| ABS | Acute Bacterial Sinusitis |
| ABS | Anti lock Brake System |
| ABSSSI | Acute Bacterial Skin and Skin Structure Infections |
| ABTS | 2,2'-Azino-bis(3-ethylBenzThiazoline-6-Sulphonic acid) |
| ABU | Amino Butyric Acid |
| AC | Alternating Current |
| AC | Anti Calcification |
| AC Eye | Artificial Cornea |
| ACA | Amino Cephalosporanic Acid |
| ACA | Amino Cyano Acetamide |
| ACAT | Acyl Coenzyme A Transferase |
| ACAT | Acyl-CoA Cholesterol O-Acyl Transferase (cholesterol biosynthesis) |
| ACC | American Chemical Council |
| ACC | Acetyl Coenzyme A Carboxylase |
| ACD | Available Chemicals Directory (database of commercially available compds) |
| ACD | Allergic Contact Dermatitis |
| ACE | Angiotensin Converting Enzyme |
| ACE | Angiotensin Converting Enzyme |
| ACEI | Angiotensin Converting Enzyme Inhibitor |
| ACF | Acute Renal Failure |
| ACFC | Activated Carbon Fiber Cloth |
| ACh | Acetyl Choline |
| ACH | Acetone Cyano Hydrin process (MMA Mfg Tech.) |
| AChE | Acetyl Choline Esterase |
| AChR | Acetyl Choline Receptor |
| ACI | Active Cell Immunotherapy |
| ACI | Active Cosmetic Ingredients |
| ACL | Adenosine triphosphate-Citrate Lyase |
| ACL Ortho | Anterior Cruciate Ligament |
| ACN | Active Corp. Name |
| AcOH | Acetic Acid |
| ACP | Acyl Carrier Protein |
| ACP | Amorphous Calcium Phosphate (dental) |
| ACPA | American Crop Protection Association |
| ACPA | American Crop Protection Association |
| ACQ | Ammoniacal Copper Quaternary (Wood Preservation) |
| ACQ | ACQuired; ACQuisition |
| ACR | Anti Coagulation Reversal |
| ACS | American Chemical Society |
| ACS | 1-Aminocyclopropane-1-Carboxylic acid Synthase |
| ACS | Acute Coronary Syndromes |
| ACSF | Artificial Cerebro Spinal Fluid |
| ACSH | American Council on Science & Health |
| ACT | Activated Checkpoint Therapy (Oncology) |
| ACT | Artemisinin based Combination Therapy |
| ACTH | Adreno Cortico Tropic Hormone |
| ACVR1 | ACtiVin A Receptor type 1 |
| AD Derma | Atopic Dermatitis |
| AD Neuro | Alzheimer's Disease |
| ADA | American Dental Association (Dental Care) |
| ADA | American Diabetes Association (Endocrinology) |
| ADAHF | American Dental Association Health Foundation |
| ADAIR | Abuse Deterrent Amphetamine Immediate Release |
| ADAS | Advanced Driver Assistance Systems |
| ADC | Antibody Drug Conjugate |
| ADC Energy | Alternating Direct Current |
| ADCA | Amino Desacetoxy Cephalosporanic Acid |
| ADCA | Azo Di Carbon Amide |
| ADCC | AB Dependent Cellular Cytotoxicity |
| ADCS | Alzheimer's Disease Cooperative Study |
| ADDL | Amyloid beta-Derived Dementing Ligands |
| ADDL | Amyloid-beta Derived Diffusible Ligands |
| ADEC | Adenoid Expressed Chemokine. |
| ADEPT | Antibody-Directed Enzyme Prodrug Therapy |
| ADFD | Azo Di Formamidine Dinitrate |
| ADG | Anaerobic Digester Gas |
| ADH | Alcohol De Hydrogenase |
| ADHD | Attention Deficit Hyperactivity Disorder |
| ADHF | Acutely Decompensated Heart Failure |
| ADI | Aliphatic Di Isocyanate |
| ADL | activities of daily living |
| Adm | Administration |
| ADMB | 1-Allyl-3,4-Di Methoxy Benzene |
| ADME | Absorption Distribution Metabolism Excretion (pharmacokinetics) |
| ADMET | Acyclic Diene METathesis |
| ADMET | Absorption, Distribution, Metabolism, Excretion & Toxicity |
| ADP | Adenosine 5' Di Phosphate |
| ADPA | Amino Di Phenyl Amine |
| ADPA | Alkylated Di Phenyl Amine (Auto>Lubricant>AntiOxidant) |
| ADPG PPase | Adenosine Di Phospho Glucose Pyro Phosphoryl ase |
| ADR | Adenoma Detection Rate |
| ADRC | Adipose-Derived stem and Regenerative Cells |
| ADS | Aspartate De Carboxylase |
| ADS | American Depositary Shares |
| ADSC | Adipose-Derived Stem Cells |
| ADT | Anti Depressant Therapy |
| ADT Onco. | androgen deprivation therapy |
| ADW | Automatic Dish Washing |
| AEA | Anion Exchange Adsorbent |
| AEC | Alkyl Epoxy Carboxylate (Water Treatment) |
| AEC | Alkyl Ether Alkoxylate |
| AEC | Anion Exchange Chromatography |
| AED | Automated External Defibrillator |
| AEEA | Amino Et EtOH Amine |
| AEM | Anion Exchange Membrane |
| AEMD | Altered Energy Metabolism Directed |
| AEMFC | AEM Fuel Cells |
| AES | Alkyl Ethoxy Sulfates |
| AEW | Airborne Early Warning |
| AF | Atrial Fibrillation |
| AFD | Aqueous Fluoropolymer Dispersion |
| AFGP | Anti Freeze Glyco Protein |
| AFl | Atrial Flutter |
| AFM | Atomic Force Microscopy |
| AFP | Anti Freeze Protein |
| AFP | Amplifying Fluorescent Polymer |
| AFP | Alpha Feto Protein. |
| Ag | Antigen |
| AGE | Advanced Glycosylation Endproducts |
| AGE | Alkyl Gluco Ester |
| AGHD | Adult Growth Hormone Deficiency |
| AGI | Ano Genital Index |
| Ago | Agonist |
| AGRP | Agouti Related Protein |
| AGTR | An Gio Tensin Receptor |
| AHA | American Heart Association |
| AHA | Alpha Hydroxy Acid |
| AHAS | Aceto Hydroxy Acid Synthase |
| AHF | Acute Heart Failure |
| AHI | Apnea Hypopnea Index |
| AHL | N-Acyl L-Homoserine Lactone |
| AHN | associated hematological neoplasm |
| AHP | acute hepatic porphyria |
| AHR | Air-Conditioning, Heating & Refrigeration |
| AHUS | Atypical Hemolytic Uremic Syndrome |
| AI | Active Ingredient |
| AI | Artificial Intelligence |
| AI | Adrenal Insufficiency |
| AIaaS | AI as a Service |
| AIAP | S-(+)-Amino-5-Iodo Acetamido Pentanoic acid |
| AID | Activation Induced cytidine Deaminase |
| AID | automated insulin delivery |
| AIDH | Aldehyde De Hydrogenase |
| AIDS | Acquired Immuno Deficiency Syndrome |
| AIH | Auto Immune Hepatitis |
| AII | Active Insecticidal Ingredient (Insecticide) |
| AIM | ApoA I Milano |
| AIMS | Anesthesia Information Management System |
| AIP | Auto Ignition Pill (airbag) |
| AIPC | Androgen Independent Prostate Cancer |
| AIST | Advanced Industrial Science & Technology (Japan) |
| AK | Acanthamoeba Keratitis |
| AK (Derma) | Actinic Keratosis |
| AKI | Acute Kidney Injury |
| ALA | 5-Amino Levulinic Acid |
| ALA | Alpha Linolenic Acid |
| Alc | Alcohol |
| ALCAN | ALuminium CANada |
| ALCL | Anaplastic Large Cell Lymphoma |
| ALCOA | ALuminium COmpany of America |
| ALD | Atomic Layer Deposition |
| ALF | Anthrax Lethal Factor |
| ALG | Antilymphocyte Globulin |
| ALGS | ALaGille Syndrome |
| ALIF | Anterior Lumbar InterBody Fusion |
| ALK | Anaplastic Lymphoma Kinase |
| ALL | Acute Lymphocytic Leukemia |
| ALL | Acute Lymphoblastic Leukemia |
| ALLOC | ALLyl Oxy Carbonyl |
| ALN | Artificial Lymph Node |
| ALS | Acid Labile Subunit (Aminoacid) |
| ALS | Aceto Lactate Synthase |
| ALS Neuro. | Amyotrophic Lateral Sclerosis |
| ALT | Alternative Lengthening of Telomeres |
| ALTP | Associação Latinoamericana de Tinta em Pó |
| AM | Anti Microbial |
| AMA | American Medical Association |
| AMCA | 1-Amino-1-methyl-3(4)-aminomethyl cyclohexane |
| AMCA | Amino Methyl Cyclohexane Amine |
| aMCI | amnestic MCI |
| AMD | Age-related Macular Degeneration |
| AME | Applied Molecular Evolution |
| AME | Aqueous Micro Emulsion |
| AMH | Anti Müllerian Hormone |
| AMI | Acute Myocardial Infarction |
| AMI | Advanced Medical Illness |
| AML | Acute Myeloid Leukemia |
| AMMPA | (S)-Acetyl-3-Mercapto-2-Methyl Propanoic Acid |
| AMMPC | (R)-Acetyl Mercapto-2-Methyl Propanoyl Chloride |
| AMP | Adenosine Mono Phosphate |
| AMP | Amino Methyl Pyrimidine |
| AMP | Anti Microbial Peptides |
| AMPA | alpha-Amino-3-hydroxy-5-Methyl isoxazole-4-Propionic Acid (neurology) |
| AMPK | Adenosine Mono Phosphate Kinase |
| AMPS | 2-Acrylamido-2-Methyl Propane-Sulfonic acid |
| AMR | Antibody Mediated Rejection |
| AMR | Anisotropic Magneto Resistance |
| AMR | Anti Microbial Resistance |
| AMRI | Albany Molecular Research Inc. |
| AMS | Alpha Methyl Styrene |
| AMS | Accelerator Mass Spectrometry |
| AMTBN | 2-Amino-4-Methyl Thio Butyro Nitrile |
| aMTC | advanced Medullary Thyroid Cancer |
| AMTEC | Alkali Metal Thermal Energy Conversion |
| AN | Access Networks |
| ANC | Active Noise Cancellation |
| ANDA | Abbreviated New Drug Application |
| ANDI | Advanced Neuro Diagnostic Imaging |
| ANG | ANGiopoietin |
| ANI | Active Nutritional Ingredient |
| ANTHEM | Anticoagulation with NAPc2 To Help Eliminate MACE (See Abbrev.) |
| AO | Amine Antioxidant |
| AOB | Ammonia Oxidizing Bacteria |
| AOM | Active Oxygen Method |
| AOM | Acute Otitis Media |
| AOM | Az Oxy Methane (Inflammation Induction) |
| AOP | Advanced Oxidation Process |
| AOS | Alpha Olefin Sulfonates |
| AOTA | American Occupational Therapy Association |
| AOTF | Acousto Optic Tunable Filter |
| AP | Advanced Polymers |
| AP | Active Principle |
| AP | AnteroPosterior (Cardiology) |
| AP | Access Point |
| aP | associated Pruritus |
| APA | Amino Penicillanic Acid (Antibiotics) |
| APAO | Amorphous Poly( Alpha Olefin) |
| APC | Antigen Presenting Cells |
| APC | American Plastics Council |
| APC | Activated Protein C (Blood Coagulation) |
| APC | Antigen Presenting Cell |
| APCI | Atmospheric Pressure Chemical Ionization |
| APD | Ablative Photo Decomposition |
| APD Pneumo | Airway Pressure Device |
| APD/H | Aqueous-Phase Dehydration/Hydrogenation |
| APDEA | Amino Propyl Di Ethanol Amine |
| APDS | Activated Phosphoinositide 3-kinase Delta Syndrome |
| APE | Apurinic. Apyrimidinic. Endonuclease |
| APE | Alkyl Phenol Ethoxylate (surfactant) |
| APEO | Alkyl Phenol Eth Oxylates |
| APF | Anti Proliferative Factor |
| APF | Animal Product Free |
| API | American Petroleum Institute |
| API | Advanced Pharma. Intermediate |
| API | Active Pharma. Ingredient |
| APL | Acute Promyelocytic Leukemia |
| APL | Anti Phospho Lipid |
| APL | Altered Peptide Ligand |
| APL | Acute Promyelocytic Leukemia |
| APLP | Amyloid Precursor-Like Protein |
| APM | Aspartyl Phenylalanine Methyl ester (Aspartame) |
| APN | Amino Peptidase N |
| APO | ApoLipoProtein |
| APP | Amyloid Precursor Protein |
| APP | American Pharmaceutical Partners |
| APP | APPlication |
| APPI | Atmospheric Pressure Photo Ionization |
| APS | Anti Phospholipid antibody Syndrome |
| APS | Advanced Planning & Scheduling |
| APT | Atom Probe Tomography |
| APTT | Activated Partial Thromboplastin Time |
| AQ | Aqueous |
| AQD | Anticancer Quinolone Derivative |
| AR | Allergic Rhinitis |
| Ar | Aryl |
| AR | Androgen Receptor |
| AR Cardio | Atrium Right |
| AR Reality | Augmented Reality |
| ARA | adenosine receptor antagonist |
| ARB | Angiotensin II Receptor Blocker |
| ARC | Anti Reflective Coating |
| ARC | AIDS Related Complex |
| ARCH | ARgonne CHicago |
| ARCO | Atlantic Richfield COmpany |
| ARDO | Associazione Ricerca e Didattica in Otologia (Italy) |
| ARDS | Adult Respiratory Distress Syndrome |
| ARF | Acute Renal Failure |
| ARF | Acute Respiratory Failure |
| ARG | Angiotensin Receptor Blocker |
| ARI | Acute Respiratory Infections |
| ARIA | Amyloid-Related Imaging Abnormalities |
| ARMD | Age-Related Macular Degeneration |
| ARMS | Alveolar Rhabdo Myo Sarcoma (oncology) |
| ARNI | Angiotensin Receptor Neprilysin Inhibitor |
| ARPKD | Autossomal Recessive Polycystic Kidney Disease |
| ARS | Agricultural Research Service (USDA) |
| ARS | Analytical Research Systems |
| ARS Radiat | Acute Radiation Syndrome |
| ART | Assisted Reproduction Technologies |
| ART | Augmented Respiration Technology |
| ARV | Anti Retro Viral |
| ARW | Accelerated Retention Window (CombiChem) |
| AS | Acrylonitrile Styrene (copolymer) |
| AS Rheuma | Ankylosing Spondylitis |
| ASA | Acrylic - Styrene - Acrylonitrile terpolymer |
| ASA | Acetyl Salicylic Acid |
| ASA | Alkenyl Succinic Anhydride |
| ASA | Amino Salicylic Acid |
| ASAP | Atmospheric Solids Analysis Probe |
| ASBTI | Apical Sodium-dependent Bile acid Transporter Inhibitor |
| ASCI | Ag Specific Cancer Immunotherapy |
| ASCO | American Society for Clinical Oncology |
| ASCRS | American Society of Cataract and Refractive Surgery |
| ASCT | Autologous Stem Cell Transplant |
| ASCVD | Athero Sclerotic CV Disease |
| ASD | Atrial Septal Defect |
| ASD Develo | Autism Spectrum Disorder |
| ASDS | Arthroscopic Subacromial Decompression Surgery |
| ASGCT | American Society of Cell and Gene Therapy |
| ASH | American Society of Hematology |
| ASI | Active SunScreen Ingredients (Personal Care>Skin Care) |
| ASI Spine | Adaptive Spine Intelligence |
| ASIC | Application Specific Integrated Circuits |
| ASIC | Acid Sensing Ion Channel (protein) |
| ASM | Aggresive Systemic Mastocytosis |
| ASMS | Affinity Selection with Mass Spectrometry detection |
| ASN | American Society of Nephrology |
| ASO | Acid Soluble Oil (hydrocarbon alkylation) |
| ASO | Anti Sense Oligonucleotide |
| ASP | Application Service Provider |
| ASPIC | Application Specific Photonic Integrated Circuits |
| ASRS | Automated Storage & Retrieval System |
| ASS | Adenyl Succinate Synthetase |
| AST | Accelerated Seldinger Technique |
| AST | Antibiotic Susceptibility Testing |
| ASTM | American Society for Testing & Materials |
| AT | Anti Thrombin |
| AT Cardio. | Atrial Fibrillation |
| AT Country | AusTria |
| AT Surgery | Articulating Technology |
| ATA | Amyloid Targeting Agent |
| ATBM | Anti-Tactical Ballistic Missiles |
| ATC | Acetyl Triethyl Citrate |
| ATCC | American Type Culture Collection |
| ATF | Artificial Transcription Factor |
| ATH | Alumina Tri Hydrate |
| ATL | Adult T cell Leukaemia/Lymphoma |
| ATM | Automatic Teller Machine |
| ATP | Adenosine Tri Phosphate |
| ATP | Adult Treatment Panel (Cardiology>Metabolic Syndrome) |
| ATR | Attenuated Total Reflectance |
| ATRA | All Trans Retinoic Acid |
| ATRP | Atom Transfer Radical Polymn |
| aTTP | acquired Thrombotic Thrombocytopenic Purpura |
| ATTR | Amyloid TransThyRetin |
| ATV | ArterioVenous Malformation |
| AU | AUstralia |
| AUC | Area Under Curve |
| AUL | Absorbency Under Load (water absorbency) |
| AUR | Acute Urinary Retention |
| AUTM | Association of University Technology Managers |
| AUTM | Association of University Technology Managers |
| AUV | Autonomous Underwater Vehicle |
| AVF | Arterio Vascular Fistula |
| AVI | Active Veterinary Ingredient |
| AVLS | American Venous and Lymphatic Society |
| AVP | Arginine Vaso Pressin |
| AWP | Average Wholesale Prices |
| Aze | S-AZEtidine-2-carboxylic acid |
| AZM | AZinphos-Methyl (Agriculture>Insecticuide) |
| AZT | 3'-AZido 3'-deoxyThymidine |