| cocktail | cocktail |
| cocktail Molotov | Molotov cocktail |
| coco | coke |
| Coco Chanel | Coco Chanel |
| Coco Lapin | Rabbit |
| Coco Lee | CoCo Lee |
| Cocoa | Cocoa |
| COCOMO | COCOMO |
| cocon | cocoon |
| cocorico | cock |
| cocotier | coconut tree |
| cocotier de mer | coco-de-mer |
| cocotte | casserole |
| cocotte-minute | pressure cooker |
| cocu | cuckold |
| cocufier | cuckold |
| Cocyte | Cocytus |
| coda | coda |
| codage | coding |
| Codage arithmétique | Arithmetic coding |
| Codage de Huffman | Huffman coding |
| Codage des caractères chinois | Chinese character encoding |
| Codage Manchester | Manchester code |
| Codage Manchester différentiel | Differential Manchester encoding |
| Codage NRZ | Non-return-to-zero |
| Codage NRZI | Non-return-to-zero |
| CODATA | Committee on Data for Science and Technology |
| code | code |
| code administratif | administrative body |
| Code AITA | IATA airport code |
| Code américain normalisé pour l'échange d'information | American Standard Code for Information Interchange |
| Code banque | Sort Code |
| Code Baudot | Baudot code |
| Code BCH | BCH code |
| Code chiffres-sons | Mnemonic major system |
| code civil | civil law |
| Code civil du Québec | Civil Code of Quebec |
| Code civil suisse | Zivilgesetzbuch |
