Cusp may refer to:

• Cusp (singularity), a singular point of a curve
• Cusp form in modular form theory
• Cuspidal representation, a generalization of cusp forms in the theory of automorphic representations
• Cusp (dentistry), a pointed structure on a cuspid, premolar, or molar
• Cusps of heart valves, leaflets of a heart valve
• Cusp (astrology), a boundary between zodiac signs and houses
• Cusp (novel), a science fiction story by Robert A. Metzger
• Beach cusps, a pointed and regular arc pattern of the shoreline at the beach

fr:Cusp it:Cuspide

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