| concavité | concavity |
| Concentrateur | Ethernet hub |
| concentration | concentration |
| Concentration alvéolaire minimale | Minimum alveolar concentration |
| concentration de polluant | pollutant concentration |
| concentration en soufre | sulphur concentration |
| concentration maximale admissible | maximum admissible concentration |
| concentration maximale d'immission | maximum immission concentration |
| concentration économique | economic concentration |
| concentrer | concentrate |
| concentrique | concentric |
| concentré | extract |
| Concepción de La Vega | Concepción de la Vega |
| Concepción del Uruguay | Concepción del Uruguay |
| concept | concept |
| concept d'environnement | concept of environment |
| Concept et objet | Concept and object |
| concepteur-rédacteur | copywriter |
| conception | understanding |
| Conception assistée par ordinateur | Computer-aided design |
| Conception asssistée par ordi | CAD |
| conception de la vie | philosophy of life |
| Conception de logiciel | Software design |
| Conception de médicament | Drug design |
| Conception de telescope | Telescope design |
| Conception de télescope | Telescope design |
| Conception des lentilles | Lens design |
| Conception dirigée | Birth control |
| conception erronée | error |
| Conception virginale | Virgin birth of Jesus |
| Conceptisme | Conceptismo |
| conceptualisation | conceptualisation |
| conceptuel | conceptual |
