- a point or pointed end.
- Anatomy, Zoology, Botany. a point, projection, or elevation, as on the crown of a tooth.
- Also called spinode. Geometry. a point where two branches of a curve meet, end, and are tangent.
- Architecture. a decorative device, used especially in Gothic architecture to vary the outlines of intradoses or to form architectural foils, consisting of a pair of curves tangent to the real or imaginary line defining the area decorated and meeting at a point within the area.
- Astronomy. a point of a crescent, especially of the moon.
- the zodiacal degree that marks the beginning of a house or a sign.
- Informal.a person born on the first day of a sign.
- a point that marks the beginning of a change: on the cusp of a new era.
Origin of cusp
Examples from the Web for cusps
Historical Examples of cusps
Tricuspidate: ending in three points: with three cusps or teeth.Explanation of Terms Used in Entomology
John. B. Smith
Quatrefoils are made by arranging four cusps within a circle.Cheshire
Charles E. Kelsey
In the sub-arches the key-stones and cusps are formed of stone.Brick and Marble in the Middle Ages
George Edmund Street
Fulgur has a median tooth with three cusps; Buccinum one with six.The Sea-beach at Ebb-tide
Augusta Foote Arnold
It is engrailed, presenting ten cusps, and may be placed in the class of decade-rings.Finger-Ring Lore
- any of the small elevations on the grinding or chewing surface of a tooth
- any of the triangular flaps of a heart valve
- a point or pointed end
- Also called: spinode geometry a point at which two arcs of a curve intersect and at which the two tangents are coincident
- architect a carving at the meeting place of two arcs
- astronomy either of the points of a crescent moon or of a satellite or inferior planet in a similar phase
- astrology any division between houses or signs of the zodiac
Word Origin for cusp
1580s, from Latin cuspis "point, spear, pointed end, head," of unknown origin. Astrological use is earliest.
- A pointed or rounded projection on the chewing surface of a tooth.
- A triangular fold or flap of a heart valve.