- cryoprotector
- cryopumping temperature
- cryorefrigerator
- cryostatic
- cryosurgical instrument
- cryotrap
- crystal defect
- crystal growing
- crystal ice
- crystal shutter
- crystal whisker
- crystalinity
- crystalline lens
- crystalline metal
- crystallite
- crystallization centre
- crystallization rate
- crystallization zone
- crystallography isomorphism
- crystalloid
- cube dilatation
- cubiform
- cubit
- cumulative exchange
- current balance
- current collector
- current
- current carrying
- current comparator
- current element
- current gain
- current interrupter
- current loop
- current measurement
- current phasor
- current pulsing
- current reflexion
- current tap
- curtailed freezing
- critical coupling
- critical damping
- critical exponent
- critical phenomena
- critical temperature
- criticality condition
- Crompton potentiometer
- cross
- cross coupling
- cross fading
- cross flux
- cross modulation
- cross ratio
- crossbar switch
- crossed nicols
- crossover
- crossover frequency
- crossover problem
- crosstalk
- crowbar
- cusp catastrophe
- customer substation
- cut
- cut-in
- cutler feed
- cutoff attenuator
- cutoff voltage
- cutoff wavelength
- cutout
- cutover
- crucible
- cryoconcentration
- cryodesiccation chamber
- cryogenerator
- cryogenic bath
- cryogenic coolant
- cryogenic cycle
- cryogenic engineer
- cryogenic evaporator
- cryogenic gas
- cryogenic insulation
- cryogenic plant
- cryogenic storage
- cryogenic system
- cryogenic temperature
- cryomagnetism
- cryopexy
- cryoprotective solution
- cryoquenching
- cryostic
- crystal formation
- crystallizing
- crystallizing period
- cubical
- cubical expansion
- cumulative distribution
- cutoff valve
- cyberspace
- cycle efficiency
- cyclic coercivity
- cyclic coordinate