- body tube
- bogie assembly
- bogie radius
- Bohr atom
- boil away
- boil over
- bone vibrator
- boomerang
- bottom fitting
- bottom quark
- boundary friction
- boundary wall
- box camera
- blowdown accident
- blurred image
- boil fast
- boil slowly
- bolometer
- bolthead flask
- bombardment
- bond
- bonding material
- boost phase
- booster pump
- bosshead
- Bragg angle
- brake pad
- brake state
- braking effort
- break down
- break up
- breakaway torque
- breeder reactor
- bremsstrahlung source
- Brewster incidence
- brightness theorem
- brine droplet
- breaking moment
- breaking pattern
- breather
- breeding
- breeding cycle
- bridge oscillation
- bright edge
- bubble cap
- bubbling
- brittle crack
- Brownian assembly
- bubble hood
- bubble level
- bucket
- buffer fiber
- bulk film
- bulk modulus
- buckminsterfullerene
- burr
- burst level
- branching device
- breaking in
- breeder
- breeding blanket
- bucking force
- bucky ball
- Bragg rule
- brake control
- brake drum
- brake wheel
- braking friction
- breeding twain
- bridge
- build-up
- bulk
- bulk technology
- buoyancy
- burette stand
- burn
- burn off
- burnout
- bursting force
- brittle failure
- bromoil print
- bubble through
- buckle
- building vibration
- buoyancy force
- buoyant force
- calibration weight
- cam shape
- camera extension
- camera lucida
- camera stand
- candle
- candle-power
- butt plate
- bypass
- cadmium-plated
- calandria
- calibrating transformer
- cam control
- cam gear