- balancing
- ball
- ball manipulator
- ballast
- ballooning instability
- bamboo effect
- band
- base fog
- base frame
- basis vector
- battery grip
- battery pack
- battery terminal
- bayonet closure
- beam diameter
- beam injection
- beam pulser
- beam reactor
- bar feed
- bar linkage
- barogram
- barometrical
- barotropic fluid
- Bartlett force
- bearer
- beat
- bellows camera
- bellows extension
- bellows frame
- bare
- bare particle
- bare reactor
- BARITT diode
- barograph
- barometer
- barometric
- baroscope
- barothermograph
- barotrauma
- barrel
- base design
- base frequency
- base power
- base scratch
- basin
- Basov diagram
- batch evaporation
- bayonet mount
- bayonet socket
- bead screen