from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A point or pointed end.
- n. Anatomy A pointed or rounded projection on the chewing surface of a tooth.
- n. Anatomy A triangular fold or flap of a heart valve.
- n. Mathematics A point at which a curve crosses itself and at which the two tangents to the curve coincide.
- n. Architecture The point of intersection of two ornamental arcs or curves, such as the inner points of a trefoil.
- n. Astronomy Either point of a crescent moon.
- n. A transitional point or time, as between two astrological signs.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A sharp point or pointed end.
- n. An important moment when a decision is made that will determine future events.
- n. 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.
- n. A boundary between zodiacal signs and houses.
- n. Any of the pointed parts of a canine tooth or molar.
from the GNU version of the Collaborative International Dictionary of English
- n. A triangular protection from the intrados of an arch, or from an inner curve of tracery.
- n. The beginning or first entrance of any house in the calculations of nativities, etc.
- n. The point or horn of the crescent moon or other crescent-shaped luminary.
- n. A multiple point of a curve at which two or more branches of the curve have a common tangent.
- n. A prominence or point, especially on the crown of a tooth.
- n. A sharp and rigid point.
- transitive v. To furnish with a cusp or cusps.
from The Century Dictionary and Cyclopedia
- n. In astronomy, the point or horn of a crescent, specifically of the crescent moon.
- n. In astrology, the beginning or first entrance of any house in the calculation of nativities.
- n. In geometry, a stationary point on a curve, where a point describing the curve has its motion precisely reversed.
- n. In architecture, an intersecting point of the small arcs or foliations decorating the internal curves of the trefoils, cinquefoils, etc., of medieval tracery; also, the figure formed by the intersection of such arcs.
- n. In zoöl. and anatomy:
- n. Any special prominence or protuberance of the crown of a tooth.
- n. A sharp tooth-like process on a margin or part.
- n. In botany, a sharp and rigid point, as of a leaf.
- n. One of the segments, with pointed tip, of a valve of the heart.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a thin triangular flap of a heart valve
- n. small elevation on the grinding surface of a tooth
- n. point formed by two intersecting arcs (as from the intrados of a Gothic arch)
Latin cuspis, point.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin cuspis ("a point, spear, pointed end"); first used in astrology. (Wiktionary)