bino - boun
- binocular microscope
- binomial theorem
- binormal
- biochemical oxygen demand
- bioconversion
- bioenergetics
- biofuel
- biogas
- biological energy conversion
- biomass
- biomechanics
- biosphere
- biot number
- biplane
- bistable circuit
- bit
- bit brace
- bitumen
- bituminous coal
- black body
- black body radiation
- black body temperature
- black bolt
- black bulb thermometer
- black lead
- black nut
- black sheet
- blackheart malleable cast iron
- blacking
- blacksmith
- blacksmith's tongs
- blacksmith's tool
- bladder type hydropneumatic accumulator
- blade
- blade base
- blade bearing
- blade efficiency
- blade exit angle
- blade inlet angle
- blade lattice
