Formulas
- Cosmic microwave background spectral distortions
- Cosmic neutrino background
- Cosmological constant
- Coulomb's law
- Count–min sketch
- Couple (mechanics)
- Course-of-values recursion
- Covariance
- Coxeter notation
- Coxeter–Dynkin diagram
- Cramer's rule
- Critical exponent
- Critical field
- Critique of the Schopenhauerian philosophy
- Cross section (geometry)