Encyclopedias, Almanacs, Transcripts, and Maps
- Center of the World
- centigrade
- Central American River Turtles (Dermatemydidae)
- Central and South American mythology
- Central Bantu Religions
- Central Criminal Court
- Cephalocarida (Cephalocarids)
- Cephalochordata (Lancelets)
- Cephalopoda (Nautilids, Octopods, Cuttlefishes, Squids, and Relatives)
- Ceratodontiformes (Australian Lungfish)
- cerebral hemispheres
- Cerenkov, Pavel Alekseievich
- Cerularios, Michael
- Cesium 137
- Cestoda (Tapeworms)
- Cetacea (Whales, Dolphins, and Porpoises)
- Ch'ŏndogyo
- Chaetognatha (Arrow Worms)
- Chameleons (Chamaeleonidae)
- Chan