| Citadella | Citadela |
| Cithara | Kitara |
| Cities in Ireland | Seznam mest na Irskem |
| citizen | državljan |
| citizen awareness | ozaveščenost državljanov |
| citizen initiative | državljanska pobuda |
| citizen rights | državljanske pravice |
| citizenship | državljanstvo |
| Citric acid cycle | Krebsov cikel |
| Citroën | Citroën |
| Citroën DS | Citroën DS |
| citrus | agrumi |
| city | mesto |
| City and town halls | Občina |
| city centre | mestno središče |
| City college | Univerza |
| City of Brussels | Bruselj |
| City of Cape Town | Kaapstad |
| City of Edinburgh | Edinburg |
| City of Glasgow | Glasgow |
| City of God | O Božji državi |
| City of San Marino | San Marino |
| City railway | Mestna železnica |
| City rights in the Netherlands | Mestne pravice |
| City status in the United Kingdom | Mestne pravice |
| City-state | Polis |
| Ciudad del Carmen | Carmen |
| Ciudad Madera | Les |
| Cividale del Friuli | Čedad |
| civil air traffic | civilni zračni promet |
| Civil defense siren | Sirena |
| civil engineering | gradbeništvo |
| civil law | rimsko pravo |
| Civil law notary | Notar |
| civil safety | varnost ljudi |
| civil service | javna uprava |
| civil war | državljanska vojna |
| civilian protection | zaščita civilnega prebivalstva |
| Civilization | Civilization |
| CK | CK |
| claim for restitution | zahtevek za povračilo |
| Clair | Nazoren |
| Clamart | Clamart |
| Clamp bolt | Vijak |
| Clara Schumann | Clara Schumann |
| Clara Zetkin | Clara Zetkin |
| clarinet | klarinet |
| Clark | Clarke |
| Clarke | Clarke |
| Clarke Island | Clarke |
| Class | Skupina periodnega sistema |
| Classic metal | Metal |
| Classical antiquity | Antika |
| Classical cipher | Števka |
| Classical electromagnetism | Elektrika in magnetizem |
| Classical element | Ogenj |
| Classical elements | Ogenj |
| Classical Japanese language | Klasična japonščina |
| Classical Kuiper belt object | Kubevan |
| Classical language | Klasični jezik |
| Classical mechanics | Mehanika |
| Classical music | Klasična glasba |
| Classical music era | Glasbeni klasicizem |
| Classical period | Glasbeni klasicizem |
| Classical philology | Klasična filologija |
| Classicism | Glasbeni klasicizem |
| classification | razvrstitev |
| Classisism | Glasbeni neoklasicizem |
| classroom | učilnica |
| Claude Debussy | Claude Debussy |
| Claude Jade | Claude Jade |
| Claude Monet | Claude Monet |
| Claude Servais Mathias Pouillet | Claude Servais Mathias Pouillet |
| Claude Shannon | Claude Elwood Shannon |
| Claudio López | Claudio López |
| Claudio Monteverdi | Claudio Monteverdi |
| Claudio Villa | Claudio Villa |
| Claudius | Klavdij I. |
| Clausius-Clapeyron relation | Clausius-Clapeyronova enačba |
| Clausius-Mossotti relation | Clausius-Mossottijeva zveza |
| clavicle | ključnica |
| claw | krempelj |
| clay | glina |
| Clay Regazzoni | Clay Regazzoni |
| clean | čist |
| clean air area | območje čistega zraka |
| clean air car | vozilo |
| clean technology | čista tehnologija |
| clean up | počistiti |
| cleaning up | melioracija |
| cleanliness | čistoča |
| cleansing department | komunalna služba |
| Cleanthes | Kleant |
| Clear red | Živordeč |
| clearing sludge | aktivno blato |
| Clef | Ključ |
| Clefs | Ključ |
| Clemens | Klemen |
| Clemens Winkler | Clemens Winkler |
| Clement | Klemen |
| Clement Attlee | Clement Attlee |
| Clemente Rodríguez | Clemente Rodríguez |
