- crossbar
- crossbar selector
- crossbeam
- crossbond
- crosscut chisel
- crosscut file
- crossed
- crossed module
- crossfall
- crossing
- crossing crosshead
- crossing pole
- crossing station
- crossover point
- crossover pole
- crossover voltage
- crosspiece
- crossrail
- crosstalk attenuation
- crosstalk coupling
- crosstalk loss
- crosstalk meter
- crowbar circuit
- crowd
- crown
- crown bit
- crown brick
- crown closure
- crown cover
- crown cup
- crown gear
- crown level
- crown saw
- crown sheet
- crowning
- croxed fitting
- croxed joint
- CRT controller
- CRT display
- crucial
- crucible furnace
- cruciform
- crude error
- crude fibre
- crude metal
- crude oil
- crude qasoline
- crude sampling
- crude wax
- crumble away
- crumbling
- crumbly
- crumbly soil
- crumpling
- crush barrier
- crush-forming
- crushed aggregate
- crushed gravel
- crushed ice
- crushed rock
- crushed sand
- crushed stone
- crusher gage
- crushing
- crushing bit
- crushing efficiency
- crushing machine
- crushing mill
- crushing resistance
- crushing roll
- crushing strain
- crushing stress
- crushing test
- crust
- crutch
- cryo technique
- cryocooler
- cryoelectric storage
- cryogenic
- cryogenic cooler
- cryogenic device
- cryogenic engineering
- cryogenic generator
- cryogenic laser
- cryogenic liquefier
- cryogenic magnet
- cryogenic refrigerant
- cryogenic technology
- cryogrinding
- cryoliquefier
- cryophysics
- cryosistor
- cryotransfer freezer
- cryotrap
- cryotron
- cryotronics
- cryptal
- cryptanalysis
- crypto equipment
- cryptographic