- core test
- coriander oil
- coring
- coring time
- cork
- corkboard
- corkite
- Corliss engine
- corn oil
- corner joint
- corner mark
- corner post
- Cornish pump
- cornwallite
- corona resistance
- corporate name
- correcting additive
- corrective
- correlated
- correlation index
- correlation shooting
- corrosion inhibitor
- corrosion preventive
- corrosion test
- corrosive sulphur
- corrugated
- corrugated glass
- corrugated iron
- corrugated rolls
- corundum
- cosmolene
- cotter joint
- cotton
- cotton linters
- cotton spirit
- cotton waste
- Cottrell precipitator
- coumalic
- coumalin
- coumarin
- counter flange
- counter project
- countercurrent distribution
- countercurrent process
- counterpoise bridge
- countersunk screw
- coupling flange
- coupling hose
- coupling shaft
- coupling sleeve
- coupon
- covalence
- covalent formula
- cover glass
- cover over
- covered karst
- covering complex
- covering power
- cosmetic
- cosolvent
- costless
- cotter puller
- coumaran
- coumaric
- count
- counter chute
- counter flush
- counter lode
- counter oil
- counter scale
- counter sea
- counter slope
- countercurrent extraction
- countercurrent leaching
- counterflange
- countless
- coupled wave
- coupling agent
- coupling box
- coupling gasket
- coupling rod
- courbaril
- covalent molecule
- covalent radius
- coverage
- coyoting
- crack branching
- crack initiation
- crack resistance
- cracked gasoline
- cracked residue
- cracking
- cracking coil
- cracking corrosion
- cracking intensity
- cracking plant
- cracking residuum
- cracking stock
- cracking unit
- crackle