China 
Africa 
- Bone morphogenetic protein 7
- Bone pain
- Bone remodeling
- Bone resorption
- Bone sarcoma
- Bone scan
- Bone scintigraphy
- Bone sialoprotein
- Bone spurs
- Bone wax
- Bonferroni correction
- Boninite
- Bonner spheres
- Bonnet
- Bony labyrinth
- Boojum
- Book value
- Bookmarking
- Bookmarklets
- Boolean
- Boolean algebra
- Boolean expression
- Boolean function
- Boolean matrix
- Boolean networks
- Boolean rings
- Boolean satisfiability problem
- Boost
- Boost converters
- Booster
- Booster pump
- Boosting
- Booting
- Bootloader
- Bootstrap
- Bootstrap aggregating
- Bootstrapping
- Borane
- Boranes
- Borate
- Borate glass
- Borate minerals
- Borax
- Borazine
- Bordetella bronchiseptica
- Boreal
- Borehole
- Borescopes
- Boresight
- Boric acid
- Borides
- Boriding
- Boring
- Born approximation
- Borneol
- Bornite
- Bornyl acetate
- Borohydride
- Boron arsenide
- Boron carbide
- Boron compounds
- Boron deficiency
- Boron fiber
- Boron group
- Boron nitride
- Boron nitride nanotubes
- Boron oxide
- Boron phosphate
- Boron steel
- Boron suboxide
- Boron tribromide
- Boron trichloride
- Boron trifluoride
- Boron trifluoride etherate
- Boron trioxide
- Boronic acid
- Borophene
- Borophosphosilicate glass
- Borosilicate glass
- Borospherene
- Borrelia burgdorferi
- Borrow pits
- Bose gas
- Bose-Einstein Condensate
- Bosonic fields
- Bosons
- Boston Keratoprosthesis
- Boswellic acid
- Botnets
- Botryoidal
- Bottle
- Bottleneck
- Bottlenecks
- Bottom ash
- Bottom bracket
- Bottom-up
- Boudinage
- Boudouard reaction
- Bouguer anomaly
- Boulangerite
- Boulder clay
- Boulders
- Boule
- Boules
- Bouma sequence
- Bound state in the continuum
- Bound states
- Bound water
- Boundary
- Boundary conditions
- Boundary layer
- Boundary layer control
- Boundary layer thickness
- Boundary representation
- Boundary scan
- Boundary tracing
- Boundary value problems
- Bounded
- Bounded function
- Bounded operator
- Bounded rationality
- Bounded variation
- Bounding box
- Bounding sphere
- Bounding volumes
- Boundstone
- Bournonite
- Bovine coronavirus
- Bovine leukemia virus
- Bovine tuberculosis
- Bow
- Bow shock
- Bow thrusters
- Bowel infarction
- Bowel obstruction
- Bowen Basin
- Bowen ratio
- Bowl
- Bowman's capsule
- Bowser
- Bowtie
- Box
- Box corer
- Box counting
- Box cut
- Box girder
- Box girder bridges
- Box plots
- Box-Jenkins
- Boxcar function