| codifier | codify |
| Codimension | Codimension |
| codirecteur | codirector |
| codirectrice | codirector |
| CODM de Meknès | CODM Meknès |
| Codogno | Codogno |
| codon | codon |
| Codon de terminaison | Nonsense triplet |
| Codon non-sens | Nonsense triplet |
| Codros | Codrus |
| Cody Runnels | Cody Rhodes |
| codé | coded |
| Codécision | Codecision procedure |
| codéine | codeine |
| coefficient | coefficient |
| Coefficient bêta | Beta coefficient |
| Coefficient de dilatation | Coefficient of thermal expansion |
| Coefficient de Gini | Gini coefficient |
| Coefficient de portance | Lift Coefficient |
| Coefficient de restitution | Coefficient of restitution |
| coefficient diagonal | diagonal element |
| Coefficients de Fresnel | Fresnel equations |
| Coefficients de Lamé | Lamé parameters |
| Coefficients UEFA | UEFA coefficients |
| Coel Hen | Old King Cole |
| coelentérés | coelenterate |
| Coelophysidae | Coelophysidae |
| Coelostat | Coelostats |
| Coeluridae | Coeluridae |
| Coelurosauria | Coelurosauria |
| Coelurus | Coelurus |
| Coenagrionidae | Coenagrionidae |
| Coendou | Prehensile-tailed porcupine |
| Coendou prehensilis | Brazilian Porcupine |
| Coenobita | Coenobita |
| Coenobita clypeatus | Caribbean hermit crab |
| Coenobitidae | Coenobitidae |
| Coenraad Jacob Temminck | Coenraad Jacob Temminck |
| Coenraad Johannes van Houten | Coenraad Johannes van Houten |
| coenure | coenure |
| Coenzyme Q - cytochrome c-réductase | Coenzyme Q - cytochrome c reductase |
| coercitif | coercive |
| coercition | compulsion |
| Coesfeld | Coesfeld |
| Coeur | Heart |
| Coeur de laitue | Chair |
| Coeur tendre | Soft heart |
| Coeur-à-coeur | Union |
| coexistence | coexistence |
| coexister | coexist |
| Coffea | Coffea |
| Coffea arabica | Coffea arabica |
| Coffea canephora | Coffea canephora |
| Coffee and Cigarettes | Coffee and Cigarettes |
| Coffee shop | Cannabis coffee shop |
| coffre | trunk |
| Coffre à cornes | Honeycomb cowfish |
| coffre à jouets | toy box |
| coffre-fort | safe |
| coffret | casket |
| Coffret électrique | Switch box |
| Cogestion paritaire | Co determination |
| Cogidubnus | Tiberius Claudius Cogidubnus |
| cogitation | reflection |
| Cogito ergo sum | Cogito ergo sum |
| cognac | brandy |
| cognasse | wild quince |
| Cognassier | Quince |
| Cognassier de Chine | Pseudocydonia |
| Cognassier du Japon | Chaenomeles |
