- casing
- catadioptric system
- catalyse
- catenary suspension
- cathode disintegration
- cathode-coupled
- cathode-spot
- cathodic space
- catoptric system
- catoptrics
- causal function
- caustic potash
- cavitation
- cavitation phenomena
- cavity coupling
- cavity filter
- cavity resonance
- ceiling battery
- ceiling coil
- ceiling diffuser
- ceiling insulation
- catastrophe fold
- catching efficiency
- cathetometer
- cathode crater
- cathode drop
- cathode follower
- cathodic protection
- cathodic reaction
- cathodic spot
- causality condition
- caustic
- caustic soda
- cavitation coefficient
- cavity radiator
- cavity tuning
- ceiling area
- ceiling fan
- ceiling outlet
- ceiling slot
- ceiling ventilator
- ceiling voltage
- cell
- cell constant
- cell voltage
- cellular structure
- cellulose
- cellulose acetate
- cellulose fibreboard
- cellulose nitrate
- celsius temperature
- cemented lens
- center loading
- centering error
- centisecond
- central acceleration
- centrifugal chiller
- centrifugal impeller
- centrifugal pump
- centrifugal sprayer
- centrifuge
- ceramic fibre
- ceramic insulator
- ceramic magnet
- center tap
- ceramic substrate
- ceramic transducer
- Cerenkov counter
- Cerenkov light
- Cerenkov radiation
- chain terminating
- chamber inlet
- channel bandwidth
- characteristic matrix
- charal
- charcoal adsorbent
- charge carrier
- charge cloud
- charging plan
- charging resistor
- charmonium
- centre core
- centre temperature
- centrifugal compression
- ceramet
- ceramic fiber
- cermet resistor
- chain decay
- chain gear
- changeover thermostat
- changer
- chaology
- chaos physics
- chaotic motion
- chaotic nature
- chaotic zone
- characteristic impedance
- charal symmetry
- charcoal adsorption
- charge