- absolute class field
- absolute class group
- absolute closure
- absolute cohomology
- absolute compactum
- absolute completeness
- absolute complex
- absolute concept
- absolute cone
- absolute configuration
- absolute congruence
- absolute conic
- absolute constant
- absolute continuity
- absolute convergence
- absolute convex hull
- absolute coordinate
- absolute counting
- absolute counting; absolute measurement
- absolute covariant
- absolute criterion
- absolute cross-section
- absolute curvature
- absolute curvature vector
- absolute cycle