Encyclopedias, Almanacs, Transcripts, and Maps
- Cocks
- coconut palm
- codes and alphabets
- Codes and Codification
- Codrington, R. H.
- Coelacanthiformes (Coelacanths)
- Cognition and Intelligence
- Cohen, Arthur A.
- Coke, Thomas
- Coleoptera (Beetles and Weevils)
- Coliiformes (Mousebirds)
- Collembola (Springtails)
- Colonialism and Postcolonialism
- Color Insert
- Colors
- Coltrane, John William
- Colubrids (Colubridae)
- Columbiformes (Pigeons, Doves, and Dodos)
- Combined Sewer Overflows
- Comédie-Française