- by-band
- by-law
- by-wash
- bye wash
- bypass
- bypass bory
- bypass engine
- bypass injection
- bypass pipeline
- byte-addressable
- C spanner
- C-clamp
- C-frame
- cabana
- cabinet loudspeaker
- cable adaptor
- cable braiding
- cable chain
- cable clamp
- cable drum
- cable fitting
- cable grip
- cable house
- cable line
- cable number
- cable preparation
- cable railroad
- cable reel
- cable ring
- cable spinner
- cable support
- cable transmission
- cable trench
- cableway
- cache
- cache memory
- cadence
- cadmium cell
- cage
- cage box
- cage shaft
- caisson
- cake
- caking coal
- calcar
- calcareous cement
- calcareous earth
- calcareous schist
- calcariferous
- calcilog
- calcinating kiln
- calcined
- calcined lime
- calciner
- calculated velocity
- calculating
- calculating stress
- calculation hypothesis
- calculation probability
- caldera
- caledonian fold
- calefactor
- calendar date
- calendar manager
- calender
- calf
- caliber
- calibrate
- calibration instrument
- calibration test
- calibrator
- caliper
- calk
- call address
- call establishment
- call instruction
- call office
- call statement
- called
- called party
- calligraphic graphics
- calling card
- calling rate
- calliper compasses
- calliper square
- callow
- calm
- calmative
- caloric content
- caloric intake
- caloric value
- calorific effect
- calorifier
- calorimetric
- calorimetric measurement
- calory
- calyx
- cam control
- cam gear
- cam profile