| clorurazione | chlorination |
| cloruro | chloride |
| Cloruro di benzalconio | Benzalkonium chloride |
| cloruro di polivinile | polyvinyl chloride |
| Cloruro di rubidio | Rubidium chloride |
| cloruro di sodio | sodium chloride |
| Cloruro di solforile | Sulfuryl chloride |
| Cloruro di tionile | Thionyl chloride |
| Cloruro manganoso | Manganese chloride |
| Cloruro rameico | Copper chloride |
| Cloruro rameoso | Copper chloride |
| Cloruro stannico | Tin chloride |
| Cloruro stannoso | Tin chloride |
| Close to Home | Close to Home |
| Close-In Weapon System | Close-in weapon system |
| Clostridium tetani | Clostridium tetani |
| Clotario I | Chlothar I |
| Clotario II | Chlothar II |
| Clotario III | Chlothar III |
| Clotario IV | Chlothar IV |
| Cloteno | Clotenus |
| Clotilde | Clotilda |
| Cloto | Clotho |
| Clotoide | Fresnel integral |
| Cloud City | Cloud City |
| Cloud Strife | Cloud Strife |
| Clover | Clover |
| Clovertown | Intel Core |
| Clovis | Clovis culture |
| clown | clown |
| Clown malvagio | Evil clown |
| Clownterapia | Clown Care |
| club | club |
| Club Air | Club Air |
| Club alpino | Alpine Club |
| Club América | Club América |
| Club Athlétique Brive Corrèze | CA Brive |
| Club Atlético Arsenal | Arsenal de Sarandí |
| Club Atlético Banfield | Club Atlético Banfield |
| Club Atlético Bella Vista | Club Atlético Bella Vista |
| Club Atlético Boca Juniors | Club Atlético Boca Juniors |
| Club Atlético Ciudad de Lorquí | Club Atlético Ciudad de Lorquí |
| Club Atlético Huracán | Club Atlético Huracán |
| Club Atlético Independiente | Club Atlético Independiente |
| Club Atlético Lanús | Club Atlético Lanús |
| Club Atlético Osasuna | CA Osasuna |
| Club Atlético Peñarol Mar del Plata | Peñarol Mar del Plata |
| Club Atlético Platense | Club Atlético Platense |
| Club Atlético River Plate | Club Atlético River Plate |
| Club Atlético Rosario Central | Rosario Central |
| Club Atlético San Lorenzo de Almagro | Club Atlético San Lorenzo de Almagro |
| Club Atlético San Martín | Club Atlético San Martín de San Juan |
| Club Atlético Tigre | Club Atlético Tigre |
| Club Atlético Vélez Sársfield | Club Atlético Vélez Sársfield |
| Club Baloncesto Málaga | CB Málaga |
| Club de Fútbol Universidad de Chile | Club de Fútbol Universidad de Chile |
| Club de Gimnasia y Esgrima La Plata | Club de Gimnasia y Esgrima La Plata |
| Club de Hockey Canadien | Montreal Canadiens |
| Club de Regatas Vasco da Gama | Club de Regatas Vasco da Gama |
| Club dei foglianti | Feuillant |
| club del libro | book club |
| Club Deportivo Castellón | CD Castellón |
| Club Deportivo Los Millonarios | Club Deportivo Los Millonarios |
| Club Deportivo Numancia de Soria | CD Numancia |
| Club Deportivo Olimpia | Club Deportivo Olimpia |
| Club Deportivo Tenerife | CD Tenerife |
| Club Deportivo Toluca | Club Deportivo Toluca |
| Club di Roma | Club of Rome |
| Club Ferro Carril Oeste | Ferro Carril Oeste |
| Club infernale | Hellfire Club |
| Club Joventut de Badalona | Joventut Badalona |
| Club Libertad | Club Libertad |
| Club Nacional de Football | Club Nacional de Football |
| Club Olimpia | Olimpia Asunción |
| Club Sportif Bourgoin-Jallieu Rugby | CS Bourgoin-Jallieu |
| Club Sportivo Cienciano | Cienciano del Cuzco |
| Clube Atlético Juventus | Clube Atlético Juventus |
| Clube Atlético Mineiro | Clube Atlético Mineiro |
| Clube Atlético Paranaense | Clube Atlético Paranaense |
| Clube de Regatas do Flamengo | Clube de Regatas do Flamengo |
| Clube Náutico Capibaribe | Clube Náutico Capibaribe |
| ClubJenna | ClubJenna |
| Cluedo | Cluedo |
| Clugin | Clugin |
| Cluj | Cluj |
| Cluj-Napoca | Cluj-Napoca |
| Cluny | Cluny |
| Clupea harengus | Herring |
| Cluses | Cluses |
| Clusone | Clusone |
| Cluster | Cluster |
| Clustering di galassie | Galaxy clustering |
| Clyde Tombaugh | Clyde Tombaugh |
| clàssico | classic |
| Cláudio Caçapa | Caçapa |
| Cláudio Hummes | Cláudio Hummes |
| Cláudio Taffarel | Cláudio Taffarel |
| Cléber Santana | Cléber Santana Loureiro |
| Cléber Santana Loureiro | Cléber Santana Loureiro |
| Clémence Poésy | Clémence Poésy |
| Clément Marot | Clément Marot |
| Cléo de Mérode | Cléo de Mérode |
| Cléty | Cléty |
| CMOS | CMOS |
| CMYK | CMYK color model |
| CN | CN |
| CN Tower | CN Tower |
| Cna | Tsna River |
| CNC | CNC |
| CNH Global | CNH Global |
| Cnidaria | Cnidaria |
| cnidario | cnidarian |
| Cnido | Knidos |
| CNIL | CNIL |
| Cniva | Cniva |
| CNN | CNN |
| CNO | CNO |
| Cnosso | Knossos |
| CO | CO |
| co- | co- |
| co-incenerimento | co-incineration |
| co-orbitale | coorbital |
| co-protagonista | co-star |
| co-querelante | co-plaintiff |
| coabitare | live together |
| coabitazione | cohabitation |
