- a point or pointed end; apex; peak
- any of the elevations on the chewing surface of a tooth
- any of the triangular flaps of a heart valve
- Archit. a projecting point where two arcs meet, as in the internal curve of an arc
- Astrol. the transitional part of a sign or house
- Astron. either horn of a crescent, as of the moon
- Geom. the tip of a pointed curve
Origin of cuspClassical Latin cuspis (gen. cuspidis), point, pointed end, spear
on the cusp
- Astrol. at or during a cusp (sense )
- at or during a time of transition, as the moment of or just before a major change or event
- A point or pointed end.
- Anatomy a. A pointed or rounded projection on the chewing surface of a tooth.b. A triangular fold or flap of a heart valve.
- Mathematics A point at which a curve crosses itself and at which the two tangents to the curve coincide.
- Architecture The point of intersection of two ornamental arcs or curves, such as the inner points of a trefoil.
- Astronomy Either point of a crescent moon.
- The boundary between two astrological signs or Zodiacal constellations.
Origin of cuspLatin cuspis, point.
- A sharp point or pointed end.
- (figuratively) An important moment when a decision is made that will determine future events.
- (geometry) A point of a curve where the curve is continuous but has no derivative, but such that it has a derivative at every nearby point.
- (architecture) A point made by the intersection of two curved lines or curved structures. A common motif in Gothic architecture.
- (astrology) A boundary between zodiacal signs and houses.
- (dentistry) Any of the pointed parts of a canine tooth or molar.