China 
Africa 
- Bortezomib
- Bosentan
- Boston Diagnostic Aphasia Examination
- Boston Naming Test
- Boston brace
- Bosutinib
- Boswellia serrata
- Boswellic acid
- Botanical drug
- Botanical gardens
- Botfly
- Botryoid rhabdomyosarcoma
- Botryomycosis
- Bottle feeding
- Bottom-up approach
- Bottom-up proteomics
- Botulinum toxin
- Botulism
- Botzinger complex
- Bouchard's nodes
- Bougie
- Bouin solution
- Bounded rationality
- Bounding pulse
- Boutonniere deformity
- Bovine coronavirus
- Bovine herpesvirus 1
- Bovine serum albumin
- Bovine somatotropin
- Bovine spongiform encephalopathy
- Bowditch effect
- Bowel cancer
- Bowel cancer screening
- Bowel incontinence
- Bowel infarction
- Bowel ischemia
- Bowel management
- Bowel obstruction
- Bowel resection
- Bowen disease
- Bowen's disease
- Bowenoid Papulosis
- Bowman Birk inhibitor
- Bowman capsule
- Bowman's capsule
- Bowman's glands
- Bowman's layer
- Bowman's membrane
- Box-Behnken design
- Boxed warning
- Boxer's fracture
- Boycott
- Bpifa1
- Braak staging
- Brachial artery
- Brachial fascia
- Brachial plexus
- Brachial plexus block
- Brachial plexus injury
- Brachial vein
- Brachialis
- Brachialis muscle
- Brachiocephalic artery
- Brachiocephalic trunk
- Brachiocephalic vein
- Brachioplasty
- Brachioradial pruritus
- Brachioradialis
- Brachioradialis reflex
- Brachycephalic
- Brachycephaly
- Brachydactyly
- Brachymetatarsia
- Brachytherapy
- Brachyury
- Bradford Hill criteria
- Bradford protein assay
- Bradycardia
- Bradykinesia
- Bradykinin
- Bradykinin receptors
- Bradyphrenia
- Bradypnea
- Bradyrhizobium
- Bradyrhizobium japonicum
- Bradyzoites
- Bragg peak
- Bragg's law
- Braille
- Brain
- Brain abscess
- Brain age
- Brain aneurysm
- Brain asymmetry
- Brain atlas
- Brain atrophy
- Brain biopsy
- Brain blood flow
- Brain cancer
- Brain cells
- Brain chemistry
- Brain computer interface
- Brain concussion
- Brain damage
- Brain death
- Brain development
- Brain diseases
- Brain disorders
- Brain dysfunction
- Brain edema
- Brain function
- Brain healing
- Brain hemorrhage
- Brain hernia
- Brain herniation
- Brain hypoxia
- Brain imaging
- Brain implant
- Brain infarction
- Brain infection
- Brain injuries
- Brain injury
- Brain ischemia
- Brain lesion
- Brain lesions
- Brain mapping
- Brain metabolism
- Brain metastasis
- Brain morphometry
- Brain neoplasms
- Brain plasticity
- Brain positron emission tomography
- Brain simulation
- Brain size
- Brain slices
- Brain stem
- Brain stem death
- Brain stimulation
- Brain stimulation reward
- Brain surgery
- Brain tissue
- Brain training
- Brain transplant
- Brain trauma
- Brain tumors
- Brain tumours
- Brain ventricle
- Brain vesicles
- Brain waves
- Brain-computer interface