| custo de vida | coût de la vie |
| custo excessivo | coût élevé |
| custo-benefício | relation coûts-bénéfices |
| Customer Information Control System | Customer Information Control System |
| customização | personnalisation |
| custos | coût |
| custos ambientais | coût environnemental |
| custos da poluição | coût de la pollution |
| custos de defesa do ambiente | coût de protection de l'environnement |
| custos de substituição | frais de remplacement |
| custoso | lourd |
| custódia | conservation |
| Custódio | Custódio Miguel Dias de Castro |
| Cut | CUT |
| cuteleira | coutelier |
| cuteleiro | coutelier |
| cutelo | sabre d'abordage |
| Cutey Honey | Cutey Honey |
| cutia | agouti |
| Cutty Sark | Cutty Sark |
| cutucar | tripoter |
| cutâneo | cutané |
| cutícula | cuticule |
| Cuvette-Ouest | Cuvette-Ouest |
| Cuxhaven | Cuxhaven |
| Cuy | Cuy |
| Cuyo | Cuyo |
| cuzão | gland |
| Cuíca-de-cauda-grossa | Lutreolina |
| CV | CV |
| CVRD Inco | Inco |
| CVS | Concurrent versions system |
| Cwichelm de Wessex | Cwichelm |
| CX | CX |
| Cyangugu | Cyangugu |
| Cyanobacteria | Cyanobacteria |
| Cyanocitta | Cyanocitta |
| Cyber café | Cybercafé |
| Cyber Sunday | WWE Cyber Sunday |
| Cyber-shot | Sony Cyber-shot |
| Cybergrind | Cybergrind |
| Cyberjaya | Cyberjaya |
| Cyberpunk | Cyberpunk |
| Cyclanthaceae | Cyclanthaceae |
| Cyclocarya | Pterocarya |
| Cyclopaedia | Cyclopaedia |
| Cyclopoida | Cyclopoida |
| Cygnus | Cygne |
| Cygwin | Cygwin |
| Cylindrophiidae | Cylindrophiidae |
| Cylon | Cylon |
| Cymbalaria | Cymbalaire |
| Cymbidium | Cymbidium |
| Cymodoceaceae | Cymodoceaceae |
| Cynara | Artichaud |
| Cyndi Lauper | Cyndi Lauper |
| Cynegils de Wessex | Cynegils |
| Cynodon | Cynodon |
| Cynodontia | Cynodontia |
| Cynoglossidae | Cynoglossidae |
| Cynric de Wessex | Cynric de Wessex |
| Cynthia Nixon | Cynthia Nixon |
| Cyperaceae | Cyperaceae |
| Cyperus | Cyperus |
| Cyperus papyrus | Cyperus papyrus |
| Cypress Hill | Cypress Hill |
| Cyprinidae | Cyprinidae |
| Cypriniformes | Cypriniformes |
| Cyprinodontidae | Cyprinodontidae |
| Cyprinodontiformes | Cyprinodontiformes |
| Cypripedium | Cypripedium |
| Cyprus Airways | Cyprus Airways |
| Cyril Norman Hinshelwood | Cyril Norman Hinshelwood |
| Cyril Scott | Cyril Scott |
| Cyrtodactylus | Cyrtodactylus |
| Cyrtosperma | Cyrtosperma |
| Cyrus | Cyrus |
| czar | tsar |
| czarado | tsarat |
| czarina | tsarine |
