From HomoExcelsior

1. A point or pointed end. 2. A pointed or rounded projection on the chewing surface of a tooth. 3. A triangular fold or flap of a heart valve. 4. A point at which a curve crosses itself and at which the two tangents to the curve coincide. 5. The point of intersection of two ornamental arcs or curves, such as the inner points of a trefoil. 6. Either point of a crescent moon. 7. A transitional point or time, as between two astrological signs.

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