- cusp-core degeneracy
- cusp field
- cusp form
- cuspid
- cuspidal asymptote
- cuspidal automorphic representation
- cuspidal curve
- cuspidal edge
- cuspidal pair
- cuspidal parabola
- cuspidal parabolic subgroup
- cuspidal part
- cuspidal point
- cuspidal tangent
- cusp locus
- cusp loss
- cusp mapping
- cusp neighborhood
- cusp of a curve
- cusp of the first kind
- cusp of the second kind
- cusp point
- cusp singularity
- custard apple
- custard apple family