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cusp



Pronunciation: (kusp), [key]
n.
1. a point or pointed end.
2. Anat., Zool., Bot.a point, projection, or elevation, as on the crown of a tooth.
3. Also called spinode. Geom.a point where two branches of a curve meet, end, and are tangent.
4. Archit.a decorative device, used esp. 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.
5. Astron.a point of a crescent, esp. of the moon.
6. Astrol.
a. the zodiacal degree that marks the beginning of a house or a sign.
b. Informal.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.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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