cusp(redirected from semilunar cusp)
Also found in: Thesaurus, Medical, Encyclopedia.
1. A point or pointed end.
a. A pointed or rounded projection on the chewing surface of a tooth.
b. A triangular fold or flap of a heart valve.
3. Mathematics A point at which a curve crosses itself and at which the two tangents to the curve coincide.
4. Architecture The point of intersection of two ornamental arcs or curves, such as the inner points of a trefoil.
5. Astronomy Either point of a crescent moon.
6. The boundary between two astrological signs or Zodiacal constellations.
on the cusp
1. On the threshold or verge of a development or action: an actor on the cusp of becoming a star.
2. At the dividing line or border of two conditions or categories: an artist on the cusp between Victorianism and modernism.
[Latin cuspis, point.]
1. (Dentistry) any of the small elevations on the grinding or chewing surface of a tooth
2. (Anatomy) any of the triangular flaps of a heart valve
3. a point or pointed end
4. (Mathematics) geometry Also called: spinode a point at which two arcs of a curve intersect and at which the two tangents are coincident
5. (Architecture) architect a carving at the meeting place of two arcs
6. (Astronomy) astronomy either of the points of a crescent moon or of a satellite or inferior planet in a similar phase
7. (Astrology) astrology any division between houses or signs of the zodiac
[C16: from Latin cuspis point, pointed end]
1. a point or pointed end.
2. an anatomical point or prominence, as on the crown of a tooth or on a valve of the heart.
3. a point where two branches of a curve meet, end, and are tangent.
4. an architectural figure consisting of a pair of curves tangent to the line defining the area, decorated and meeting at a point within the area.
5. a point of a crescent, esp. of the moon.
a. the degree of the zodiac that marks the beginning of an astrological house or sign.
b. the beginning, esp. the first day, of a new sign.
c. a person born on the first day of a sign.
7. a point that marks the beginning of a change: on the cusp of a new era.
[1575–85; < Latin cuspis a point]
Either of the two points of a crescent moon.
Switch to new thesaurus
|Noun||1.||cusp - point formed by two intersecting arcs (as from the intrados of a Gothic arch)|
point - sharp end; "he stuck the point of the knife into a tree"; "he broke the point of his pencil"
|2.||cusp - a thin triangular flap of a heart valve|
flap - a movable piece of tissue partly connected to the body
|3.||cusp - small elevation on the grinding surface of a tooth|
tooth - hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense
to be on the cusp of sth (= at the beginning of) → être à l'orée de qch
cusp[kʌsp] n → cuspide f
n. cúspide, punta.