- Alpha amino acid
- Alpha amylase
- Alpha amylase inhibitor
- Alpha blockers
- Alpha bungarotoxin
- Alpha cell hyperplasia
- Alpha cells
- Alpha chain
- Alpha defensin
- Alpha dystroglycan
- Alpha enolase
- Alpha fetoprotein
- Alpha galactosidase
- Alpha globulin
- Alpha glucan
- Alpha glucosidase
- Alpha glucosidase inhibitor
- Alpha granules
- Alpha helix
- Alpha hemolysin
- Alpha hydroxy acid
- Alpha interferon
- Alpha ketoglutaric acid
- Alpha lactalbumin
- Alpha linolenic acid
- Alpha mannosidase
- Alpha melanocyte stimulating hormone
- Alpha melanocyte-stimulating hormone
- Alpha methyl p tyrosine
- Alpha motor neurons
- Alpha particle
- Alpha pinene
- Alpha radiation
- Alpha rhythm
- Alpha secretase
- Alpha synuclein
- Alpha thalassemia
- Alpha tocopherol
- Alpha toxin
- Alpha waves
- Alpha-1 antitrypsin deficiency
- Alpha-1-microglobulin
- Alpha-2 blocker
- Alpha-2-macroglobulin
- Alpha-Pyrrolidinopentiophenone
- Alpha-adrenergic agonist
- Alpha-aminoadipic acid
- Alpha-amylase
- Alpha-bungarotoxin
- Alpha-enolase
- Alpha-fetoprotein
- Alpha-globulin
- Alpha-glucosidase
- Alpha-glucosidase inhibitors
- Alpha-keratin
- Alpha-ketoglutaric acid
- Alpha-lactalbumin
- Alpha-linolenic acid
- Alpha-lipoic acid
- Alpha-mannosidase
- Alpha-melanocyte-stimulating hormone
- Alpha-methylacyl-CoA racemase
- Alpha-methylacyl-coa racemase
- Alpha-naphthylthiourea
- Alpha-synuclein
- Alpha-thalassemia
- Alpha-thalassemia mental retardation syndrome
- Alpha-tocopherol
- Alpha-v beta-3
- AlphaFold
- Alphacoronavirus
- Alphaherpesvirinae
- Alphapapillomavirus
- Alphaproteobacteria
- Alphatorquevirus
- Alphavirus
- Alphavirus infection
- Alphaviruses
- Alpidem
- Alpinia galanga
- Alpinia officinarum
- Alport syndrome
- Alprazolam
- Alprenolol
- Alstrom syndrome
- Altanserin
- Alteplase
- Altered Schaedler flora
- Altered level of consciousness
- Altered mental state
- Altered states of consciousness
- Alternariol
- Alternate day fasting
- Alternating electric field therapy
- Alternating hemiplegia
- Alternating hemiplegia of childhood
- Alternative Lengthening of Telomeres
- Alternative RNA splicing
- Alternative cancer treatments
- Alternative complement pathway
- Alternative hypothesis
- Alternative medicine
- Alternative splicing
- Alternatives to animal testing
- Alteromonas
- Althesin
- Altitude acclimatization
- Altitude sickness
- Altitude training
- Altman Self-Rating Mania Scale
- Altretamine
- Altruism
- Altruistic behavior
- Alu element
- Alum
- Alumina
- Aluminium hydroxide
- Aluminium oxide
- Aluminium phosphate
- Aluminium phosphide
- Aluminium silicate
- Aluminium sulfate
- Aluminum
- Aluminum chloride hexahydrate
- Aluminum fluoride
- Aluminum hydroxide
- Aluminum oxide
- Aluminum phosphate
- Aluminum phosphide
- Aluminum sulfate
- Alvarado score
- Alveolar
- Alveolar arterial gradient
- Alveolar bone
- Alveolar capillary dysplasia
- Alveolar epithelium
- Alveolar gas equation
- Alveolar hydatid disease
- Alveolar macrophages
- Alveolar nerve
- Alveolar osteitis
- Alveolar pressure
- Alveolar process
- Alveolar rhabdomyosarcoma
- Alveolar soft part sarcoma
- Alveolar-arterial gradient
- Alveoli
- Alveolitis
- Alverine
- Alveus