- camera-obscure
- camouflage
- camping refrigerator
- can freezing
- canalize
- canned pump
- canonical transformation
- cap
- capacitance box
- capacitive divider
- capacitor bank
- capillary system
- capture process
- bypass valve
- cable armor
- cable distribution
- cage winding
- calculable capacitor
- calefaction
- calm air
- calorescence
- calorific value
- calorimetric meter
- camera tube
- caesium vapour
- calcination
- calefacient
- calibration
- calibration curve
- call handling
- call simulator
- calomel electrode
- caloric
- caloricity
- Campbell bridge
- candela
- capacitance bridge
- capacitive coupling
- capacitive diaphragm
- capacitive post
- capacitor motor
- capacitor reactance
- capacity reduction
- capillary cell
- capillary tension
- capristor
- capsule
- capture efficiency
- capture reaction
- car heater
- carbon arc
- carbon caking
- capacitive load
- capacitive switch
- capacitor transformer
- capacity adjustment
- capacity range
- capacity utilization
- capillary depression
- carbon
- carbon freezing
- carbonization
- carbontetrafluoride
- cargo container
- carbon agglomeration
- carbon dioxide
- carbon microphone
- carbon pile
- carbon tetrafluoride
- cargo batten
- cargo compartment
- cargo refrigeration
- cargo space
- cargo stowage
- Carnot efficiency
- Carnot number
- cascade compression
- cascade control
- cascade liquefaction
- cascade refrigeration
- cascade system
- Cassgrain system
- Cassgrain telescope
- carrier
- carrier frequency
- carrier injection
- carrier line
- carrier loading
- carrier recombination
- carrier recovery
- Carter chart
- Cartesian coordinate
- cascade circuit
- cascade condensation
- cascade connection
- cascade converter
- cascade evaporator
- cascade networks
- cascade regulator
- cascade transformer