- Cosmogony: The theory about the origin of the universe.
- Cosmology: The science of nature, origin and history of the universe.
- Craniology:The study of the different physical characteristics of the skull.
- Criminology: Scientific study of crime and criminals.
- Cryobiology:It is the study of the effects of low temperatures on various living things.
- Cryogenics: The science dealing with the production, control and application of very low temperature.
- Cryptography: The study decoding information for security purposes.
- Crystallography: The science that studies the arrangement of atoms in solids.
- Cybernetics:It is the study of regulatory systems and their structures.
- Cytology: The study of cells, their formation structure and functions.