C (42 madde)
- Campanella, Tommaso
- canlı
- canlıcılık
- Canterbury başpiskoposluğu
- Capella, Martianus
- Carlyle, Thomas
- Cassidor
- causa efficiens
- causa finalis
- causa formalis
- causa materialis
- causa occasionales
- causa sui
- Cezvitler
- Charron, Pierre
- Chartres Okulu
- Christian Thomasius
- Cicero
- cisimsel
- Civitas Solis
- Clairvauxlu Bernhard
- Clarke, Samuel
- Cogito ergo sum
- cognitio adaequata
- cognitio clara
- cognitio clara confusa
- cognitio clara et distincta
- cognitio confusa
- cognitio imperfecta
- coincidentia oppositorum
- conclusio
- Condillac, Etienne Bonnot de
- contemplatio
- Cornelius Jansenius
- correlation
- coşku
- Credo quia absurdum est
- Credo ut intelligam
- Cudworth, Ralph
- Cumberland, Richard
- cumhuriyet
- Cusanus, Nicolaus