| cuándo | quand |
| cuántas | combien |
| cuántas veces | combien de fois |
| cuánto | combien |
| cuántos | combien |
| Cuáquera | quakeresse |
| cuáquero | quaker |
| cuévano | panier |
| cuña | cale |
| cuñada | belle-sœur |
| cuñado | beau-frère |
| CV | CV |
| CVS | Concurrent versions system |
| CW-complejo | CW-complexe |
| Cx | CX |
| Cyangugu | Cyangugu |
| cyanobacteria | algue bleue |
| Cyanochen cyanopterus | Ouette à ailes bleues |
| Cyanocitta | Cyanocitta |
| Cyanocitta stelleri | Geai de Steller |
| Cyanocorax beecheii | Geai à dos violet |
| Cyanocorax chrysops | Geai acahé |
| Cyanoliseus patagonus | Cyanoliseus patagonus |
| Cyanopsitta spixii | Ara de Spix |
| Cyathea | Cyathea |
| Cyberpunk | Cyberpunk |
| Cycadaceae | Cycadaceae |
| Cycadatae | Cycadophyta |
| Cycadophyta | Cycadophyta |
| Cycas | Cycadaceae |
| Cycas revoluta | Cycas du Japon |
| Cyclanthaceae | Cyclanthaceae |
| Cyclopaedia | Cyclopaedia |
| Cyclorana | Cyclorana |
| Cydia pomonella | Carpocapse des pommes et des poires |
| Cydonia Mensae | Cydonia Mensae |
| Cydonia oblonga | Cognassier |
| Cygnus | Cygne |
| Cygnus melancoryphus | Cygne à cou noir |
| Cygnus olor | Cygne tuberculé |
| Cygwin | Cygwin |
| Cylindropuntia | Cylindropuntia |
| Cylon | Cylon |
| Cymbalaria | Cymbalaire |
| Cymbalaria muralis | Cymbalaire des murs |
| Cymbidium | Cymbidium |
| Cymodoceaceae | Cymodoceaceae |
| Cynara | Artichaud |
| Cynara scolymus | Artichaut |
| Cyndi Lauper | Cyndi Lauper |
| Cynegils de Wessex | Cynegils |
| Cynipidae | Cynipidae |
| Cynipoidea | Cynipidae |
| Cynodon | Cynodon |
| Cynodontia | Cynodontia |
| Cynogale Bennettii | Civette-loutre de Sumatra |
| Cynognathus | Cynognathus |
| Cynops | Cynops |
| Cynthia Rothrock | Cynthia Rothrock |
| Cyperaceae | Cyperaceae |
| Cyperales | Cyperales |
| Cyperus | Cyperus |
| Cyperus esculentus | Souchet comestible |
| Cyperus papyrus | Cyperus papyrus |
| Cypress Hill | Cypress Hill |
| Cyprien Ntaryamira | Cyprien Ntaryamira |
| Cyprinidae | Cyprinidae |
| Cypriniformes | Cypriniformes |
| Cyprinodontidae | Cyprinodontidae |
| Cypripedium | Cypripedium |
| Cypripedium acaule | Cypripède acaule |
| Cyprus Airways | Cyprus Airways |
| Cyprus Broadcasting Corporation | Cyprus Broadcasting Corporation |
| Cyrano de Bergerac | Savinien de Cyrano de Bergerac |
| Cyril Meir Scott | Cyril Scott |
| Cyril Norman Hinshelwood | Cyril Norman Hinshelwood |
| Cyril Raffaelli | Cyril Raffaelli |
| Cyrus Vance | Cyrus Vance |
| Cyrus West Field | Cyrus Field |
| Czech Airlines | CSA Czech Airlines |
| Czesław Miłosz | Czesław Miłosz |
| Czesław Niemen | Czesław Niemen |
| Częstochowa | Częstochowa |
| Cábala | Kabbale |
| Cáceres | Cáceres |
| Cádiz | Cadix |
| Cádiz Club de Fútbol | Cadix CF |
| cálamo aromático | acore odorant |
| cálcico | calcique |
| cálculo | évaluation |
