- crystallographic
- cubic dilatation
- cubic distortion
- cubic foot
- cubic lattice
- cubic system
- cuesta backslope
- cuesta inface
- cull
- cumic aldehyde
- cumulophyric texture
- cup
- cup coral
- cupellation furnace
- cupro-ammonia
- cupro-nickel
- cuproxide
- curbstone market
- cure
- curing bag
- curing compound
- curing time
- cutoff meander
- cutter bar
- cutter loader
- cutting
- cutting gas
- cutting nippers
- cutting oil
- cutting outfit
- cutting pliers
- cyanic
- cyanidation
- cyanide
- cyanide plant
- cyanide process
- cyanide treating
- cyaniding
- cyaniding vat
- cyanoacrylate adhesive
- cycle oil
- cycle period
- cycle stock
- cycle track
- cyclic
- cyclic action
- cyclic compound
- cyclic hydrocarbon
- cyclicized rubber
- cycling
- cycling plant
- cyclization
- cyclization process
- cycloaliphatic amine
- cycloalkane
- cyclohexane
- cyclohexanol
- cyclohexanone
- cyclone separator
- cyclonite
- cycloolefin
- cycloparafine
- cyclosillicate
- cyclotherm
- cylinder barrel
- cylinder charge
- cylinder oil
- cylinder valve
- cylindrical tank
- cylindriconical drum
- cymoscope
- cyperus oil
- cypress oil
- cytosine
- D-glucosamine
- dacite
- dacitic
- dacron
- dactylite
- dactylitic
- dag
- dahamite
- dahlin
- dahoma
- daily loss
- daily output
- dark red
- darkening
- datiscin
- datum level
- datum point
- daughter cell
- deactivation
- dead hole
- dead roasting
- dead steam
- dead work
- deballasting water
- debitumenization
- deblooming agent