- cable tunnel
- cablegram
- cage relay
- calculation
- calibration
- calibration mark
- calomel electrode
- cam
- capacitance
- canceling key
- cap lamp
- capacitance coefficient
- capacitive feedback
- capacitive resistance
- capacitor cubicle
- capacitor film
- capacitor motor
- capacitor reactance
- capacitor unit
- Capital goods
- carbon brush
- capacitive current
- capacitive load
- capacitor discharge
- capacity meter
- carbon black
- carboy
- Carcel lamp
- card
- Cardew voltmeter
- cardioids diagram
- carbon contact
- carbon hiss
- carbon test
- carbonite
- cargo
- cargo insurance
- carnauba wax
- cartridge fuse
- cascade
- cascade set
- casing line
- carrier
- carrier current
- carrier shift
- carrier suppressed
- carrier way
- cascade arrangement
- cascade transformer
- case battery
- catalytic reaction
- catenary suspension
- cathode circuit
- cathode glow
- cathode layer
- cathodic screen
- catline
- catline grip
- caustic potash
- cavitation
- cataphoresis
- cathead line
- cathode drop
- cathodic
- cathodic protection
- cavity resonator
- cell
- cell connector
- cell constant
- cell polarization
- cell secondary
- central furnace
- centrifugal pump
- ceramic
- ceramic insulator
- center tap
- centering
- centigrade temperature
- central heating
- ceramic insulators
- chaplet
- charge carrier
- charge leakage
- charge neutralization
- charge storage
- centre tap
- ceramic capacitor
- ceramic filter
- cermet resistor
- cesium cathode
- chain
- chain hoist
- chain insulator
- chain sling
- chain tightener
- channel stopper
- character signal
- characteristic admittance
- characteristic impedance
- charge