Prime Algebraic Number
An irreducible Algebraic Integer which has the property that, if it divides the product of two algebraicIntegers, then it Divides at least one of the factors. 1 and 
are the onlyIntegers which Divide every Integer. They are therefore called thePrime Units.
- Cunningham Function
- Cunningham Number
- Cunningham Project
- Cupola
- Cupolarotunda
- Curl
- Curlicue Fractal
- Curl Theorem
- Current
- Curtate Cycloid
- Curtate Cycloid Evolute
- Curvature
- Curvature Center
- Curvature Scalar
- Curvature Vector
- Curve
- Curve of Constant Breadth
- Curve of Constant Precession
- Curve of Constant Slope
- Curve of Constant Width
- Curvilinear Coordinates
- Cushion
- Cusp
- Cusp Catastrophe
- Cusp Form