- Bromocresol green
- Bromocresol purple
- Bromocriptine
- Bromodeoxyuridine
- Bromoderma
- Bromodomains
- Bromoethane
- Bromophenol
- Bromothymol blue
- Bromoviridae
- Brompheniramine
- Bronchi
- Bronchial arteries
- Bronchial artery
- Bronchial artery embolization
- Bronchial asthma
- Bronchial challenge test
- Bronchial circulation
- Bronchial diseases
- Bronchial hyperresponsiveness
- Bronchial thermoplasty
- Bronchial tubes
- Bronchiectasis
- Bronchiole
- Bronchioles
- Bronchiolitis
- Bronchiolitis obliterans
- Bronchioloalveolar carcinoma
- Bronchitis
- Bronchoalveolar lavage
- Bronchoalveolar lavage fluid
- Bronchocele
- Bronchoconstriction
- Bronchodilatation
- Bronchodilators
- Bronchogenic cyst
- Bronchography
- Bronchomalacia
- Bronchophony
- Bronchopleural fistula
- Bronchopneumonia
- Bronchopulmonary dysplasia
- Bronchopulmonary segment
- Bronchopulmonary segments
- Bronchorrhea
- Bronchoscopy
- Bronchospasm
- Bronopol
- Broselow tape
- Broth microdilution
- Broviac catheter
- Brown adipose tissue
- Brown syndrome
- Brown tumor
- Brown's syndrome
- Brown-Sequard syndrome
- Brown-Séquard syndrome
- Brown-Vialetto-Van Laere syndrome
- Brown–Vialetto–Van Laere syndrome
- Bruce protocol
- Brucella
- Brucella abortus
- Brucella canis
- Brucella suis
- Brucellosis
- Bruch membrane
- Bruch's membrane
- Brucine
- Brucite
- Brudzinski's sign
- Brugada syndrome
- Brugia
- Brugia malayi
- Brugia timori
- Brugmansia
- Bruise
- Bruising
- Bruit
- Brunner's glands
- Brush border
- Brushfield spots
- Bruton tyrosine kinase
- Bruton's tyrosine kinase
- Bruxism
- Bryonia
- Bryophyllum pinnatum
- Bryostatin
- Bubble CPAP
- Buboes
- Bubonic plague
- Buccal administration
- Buccal artery
- Buccal branch
- Buccal branch of the facial nerve
- Buccal cavity
- Buccal fat pad
- Buccal mucosa
- Buccal nerve
- Buccal space
- Buccal swab
- Buccinator muscle
- Buccopharyngeal fascia
- Bucillamine
- Bucindolol
- Buck's fascia
- Buckling
- Buckminsterfullerene
- Budd-Chiari syndrome
- Budding
- Budding yeast
- Budesonide
- Buerger's disease
- Bufalin
- Bufexamac
- Buffalopox
- Buffers
- Buffy coat
- Buformin
- Bufotalin
- Bufotenin
- Bufotenine
- Bufuralol
- Bulb of penis
- Bulbar palsy
- Bulbocavernosus muscle
- Bulbocavernosus reflex
- Bulbospongiosus
- Bulbospongiosus muscle
- Bulbourethral gland
- Bulbus cordis
- Bulging flanks
- Bulgur
- Bulimia
- Bulimia nervosa
- Bulk density
- Bulking agent
- Bull's eye maculopathy
- Bullatacin
- Bullectomy
- Bulleidia
- Bullous impetigo
- Bullous keratopathy
- Bullous pemphigoid
- Bullying
- Bullying in nursing
- Bumetanide
- Bun-to-creatinine ratio
- Bundibugyo ebolavirus
- Bundle branch
- Bundle branch block