| Claude Mellan | Claude Mellan |
| Claude Monet | Claude Monet |
| Claude Nicolas Ledoux | Claude Nicolas Ledoux |
| Claude of France | Klaudia de Valois |
| Claude of Valois | Klaudia de Valois |
| Claude Shannon | Claude E. Shannon |
| Claude Simon | Claude Simon |
| Claude Vorilhon | Claude Vorilhon |
| Claudette Colbert | Claudette Colbert |
| Claudia | Klaudia |
| Claudia Acte | Akte |
| Claudia Antonia | Klaudia Antonia |
| Claudia Cardinale | Claudia Cardinale |
| Claudia Felicitas of Austria | Klaudia Felicyta Habsburg |
| Claudia Marcella | Marcela Młodsza |
| Claudia Octavia | Oktawia Młodsza |
| Claudia Schiffer | Claudia Schiffer |
| Claudio Abbado | Claudio Abbado |
| Claudio Caniggia | Claudio Caniggia |
| Claudio Fava | Claudio Fava |
| Claudio Gentile | Claudio Gentile |
| Claudio López | Claudio López |
| Claudio Magris | Claudio Magris |
| Claudio Monteverdi | Claudio Monteverdi |
| Claudio Reyna | Claudio Reyna |
| Claudius | Klaudiusz |
| Claudius Aelianus | Claudius Aelianus |
| Claudius I | Klaudia |
| Claudius II | Klaudiusz II Gocki |
| Claudius Silvanus | Silwanus |
| Claus Schenk Graf von Stauffenberg | Claus von Stauffenberg |
| Claus von Amsberg | Claus |
| clause | zdanie podrzędne |
| Clausius-Clapeyron relation | Równanie Clausiusa-Clapeyrona |
| claustrophobia | klaustrofobia |
| Clausula rebus sic stantibus | Klauzula rebus sic stantibus |
| clavicle | obojczyk |
| Claviere | Claviere |
| claw | pazur |
| claws | kleszcze |
| clay | glina |
| Clay Bailey | Clay Bailey |
| Clay County | Hrabstwo Clay |
| Clay Mathematics Institute | Problemy milenijne |
| Clay minerals | Minerały ilaste |
| Clay Regazzoni | Clay Regazzoni |
| claystone | iłowiec |
| Clayton Anderson | Clayton Anderson |
| Clayton County | Hrabstwo Clayton |
| clean | czysty |
| clean air area | obszar czystego powietrza |
| clean air car | czyste pojazdy |
| Clean and press | Wyoblanie |
| Clean Monday | Czysty Poniedziałek |
| clean sheet | czyste konto |
| clean technology | czystsza technologia |
| clean up | sprzątać |
| cleaning lady | sprzątaczka |
| cleaning up | czyszczenie |
| cleanliness | czystość |
| cleanness | czystość |
| Cleanroom Software Engineering | Cleanroom |
| cleanse | przemywać |
| cleansing department | wydział oczyszczania |
| Cleanthes | Kleantes |
| cleanup | porządek |
| clear | czysty |
| Clear Island | Cape Clear |
| clear of snow | odśnieżać |
| clear off | wynocha |
| clear out | pryskać |
| clear-cut | wyraźny |
| Clearchus | Klearchos |
| Clearchus of Sparta | Klearchos |
| clearing | polana |
| clearing of snow | odśnieżanie |
| clearing sludge | osady z oczyszczania |
| clearly | jasno |
| cleartext | tekst |
| ClearType | ClearType |
| Clearwater | Clearwater |
| Clearwater County | Hrabstwo Clearwater |
| Clearwing moth | Przeziernikowate |
| cleavage | dekolt |
| cleave | przerywać |
| cleaver | tasak |
| Cleburne County | Hrabstwo Cleburne |
| Cleebronn | Cleebronn |
| clef | klucz |
| Clefs | Klucz |
| cleft | szczelina |
| Cleft of venus | Cameltoe |
| Cleidocranial dysostosis | Dysplazja obojczykowo-czaszkowa |
| Cleisthenes | Klejstenes |
| Cleisthenes of Sicyon | Klejstenes |
| Cleistocactus | Kleistokaktus |
| Clemastine | Klemastyna |
| clematis | powojnik |
| Clematis flammula | Powojnik południowy |
| Clematis recta | Powojnik prosty |
| Clematis vitalba | Powojnik pnący |
| Clemens | Klemens |
| Clemens August Graf von Galen | Klemens August von Galen |
| Clemens August of Bavaria | Klemens August Wittelsbach |
| Clemens Brentano | Clemens Brentano |
| Clemens Maria Hofbauer | Klemens Maria Hofbauer |
| Clemens von Pirquet | Clemens Peter Freiherr von Pirquet |
| Clement | Klemens |
| Clement Arrindell | Clement Arrindell |
| Clement Attlee | Clement Richard Attlee |
| Clement of Alexandria | Klemens Aleksandryjski |
| Clement of Ohrid | Klemens z Ochrydy |
| Clemente Domínguez y Gómez | Clemente Domínguez y Gómez |
| Clemente Venceslao di Sassonia | Klemens Wacław Wettyn |
| Clementina Sobieski | Maria Klementyna Sobieska |
| Clementine probe | Klemencja |
| Clemson University | Uniwersytet Clemson |
| Clenleu | Clenleu |
| Cleomenes I | Kleomenes I |
| Cleon | Kleon |
| Cleon II | Cleon II |
| Cleopatra | Kleopatra |
| Cleopatra Eurydice of Macedon | Kleopatra |
| Cleopatra I of Egypt | Kleopatra I |
| Cleopatra II of Egypt | Kleopatra II |
| Cleopatra III of Egypt | Kleopatra III |
| Cleopatra of Macedon | Kleopatra |
| Cleopatra Selene | Kleopatra Selene |
| Cleopatra Selene II | Kleopatra Selene |
| Cleopatra Thea | Kleopatra Thea |
| Cleopatra VII | Kleopatra VII |
| Cleph | Klef |
| clergy | duchowieństwo |
| clergyman | duchowny |
| cleric | duchowny |
| clerical | duchowny |
| clerical collar | koloratka |
| Clerical fascism | Faszyzm klerykalny |
| Clerical script | Pismo kancelaryjne |
| Cleridae | Przekraskowate |
| Clermont Foot | Clermont Foot |
| Clermont-Ferrand | Clermont-Ferrand |
| Clermont-Ferrand Auvergne Airport | Port lotniczy Clermont-Ferrand |
| Clervaux | Kanton Clervaux |
| Cleveland | Cleveland |
| Cleveland Bay | Cleveland Bay |
| Cleveland Browns | Cleveland Browns |
