| CMOS | Complementary metal oxide semi-conductor |
| CMYK | Quadrichromie |
| CMYK color model | Quadrichromie |
| CN | CN |
| CN stars | Etoile a CN |
| CN Tower | Tour CN |
| Cnaeus Domitius Ahenobarbus | Gnaeus Domitius Ahenobarbus |
| CNC | CNC |
| CNET | CNET Networks |
| CNET Networks | CNET Networks |
| CNG | GNC |
| CNH Global | CNH Global |
| Cnicus | Chardon béni |
| Cnidaria | Cnidaria |
| Cnidium | Cnidium |
| CNN | Cable News Network |
| CNO | CNO |
| CNO anomalies | Anomalie en CNO |
| CNO cycle | Cycle carbone-azote-oxygène |
| CNOOC | Chinese national off-shore oil company |
| CO | CO |
| Co determination | Cogestion paritaire |
| Co editor | Coéditeur |
| Co operative society | Coopérative |
| co- | co- |
| co-ed | coéducationnel |
| co-education | enseignement mixte |
| co-educational | coéducationnel |
| Co-evolution | Coévolution |
| co-father-in-law | co-beau-père |
| co-incineration | co-incinération |
| co-mother-in-law | co-belle-mère |
| co-op | coopération |
| co-operate | collaborer |
| co-operation | collaboration |
| co-operation policy | politique de coopération |
| co-operation principle | principe de coopération |
| co-operative | coopération |
| Co-operative Commonwealth Federation | Parti social démocratique du Canada |
| co-operator | associé |
| co-opt | coopter |
| co-ordinate | coordonner |
| co-ordinate system | système de coordonnées |
| co-ordination | coordination |
| co-ordinator | coordinateur |
| co-owner | copropriétaire |
| co-ownership | copropriété |
| co-parent | coparent |
| co-plaintiff | codemandeur |
| co-religionist | coreligionnaire |
| Co-signing | Caution personnelle |
| co-star | partenaire |
| Co-trimoxazole | Co-trimoxazole |
| co-wife | sœur-épouse |
| co-worker | associé |
| Co. | cie |
| coach | instruire |
| Coach-driver | Cocher |
| Coachella Valley | Vallée de Coachella |
| coaching | entraînement |
| coachman | cocher |
| coadjutor | coadjuteur |
| Coadout | Coadout |
| coagulant | coagulant |
| coagulate | coaguler |
| coagulated | gelé |
| coagulating | coagulation |
| coagulation | coagulation |
| Coahuila | Coahuila |
| Coahuiltecan | Coahuiltecan |
| Coahuilteco language | Coahuilteco |
| coal | charbon |
| Coal Grove | Coal Grove |
| coal industry | industrie charbonnière |
| coal liquefaction | liquéfaction du charbon |
| coal mine | mine |
| coal mining | extraction de charbon |
| coal oil | pétrole |
| coal refining | raffinage de la houille |
| coal tar | coaltar |
| coal technology | technologie du charbon |
| coal-based energy | énergie à base de charbon |
| coal-fired power plant | centrale à charbon |
| Coala bear | Koala |
| Coalbrookdale | Coalbrookdale |
| coalesce | s'unir |
| coalescence | union |
| coalescer | coalesceur |
| coalfield | bassin houiller |
| coalfish | colin |
| coalition | coalition |
