*cusp*

{ } a. [ See pref. Bi-, and Cuspidate. ] Having two points or prominences; ending in two points; -- said of teeth, leaves, fruit, etc. [ 1913 Webster ]

n. [ L. cuspis, -idis, point, pointed end. ] [ 1913 Webster ]

1. (Arch.) A triangular protection from the intrados of an arch, or from an inner curve of tracery. [ 1913 Webster ]

2. (Astrol.) The beginning or first entrance of any house in the calculations of nativities, etc. [ 1913 Webster ]

3. (Astron) The point or horn of the crescent moon or other crescent-shaped luminary. [ 1913 Webster ]

4. (Math.) A multiple point of a curve at which two or more branches of the curve have a common tangent. [ 1913 Webster ]

5. (Anat.) A prominence or point, especially on the crown of a tooth. [ 1913 Webster ]

6. (Bot.) A sharp and rigid point. [ 1913 Webster ]

v. t. [ imp. & p. p. Cusped p. pr. & vb. n. Cusping. ] To furnish with a cusp or cusps. [ 1913 Webster ]

a. Ending in a point. [ 1913 Webster ]

adj. having cusps or points.
Syn. -- cuspated, cuspidal, cuspidate, cuspidated. [ WordNet 1.5 ]

n. [ See Cusp. ] (Anat.) One of the canine teeth; -- so called from having but one point or cusp on the crown. See Tooth. [ 1913 Webster ]

a. [ From L. cuspis, cuspidis. See Cusp. ] Ending in a point. [ 1913 Webster ]

v. t. To make pointed or sharp. [ 1913 Webster ]

{ } a. [ L. cuspidatus, p. p. of cuspidare to make pointed, fr. cuspis. See Cusp. ] Having a sharp end, like the point of a spear; terminating in a hard point; as, a cuspidate leaf. [ 1913 Webster ]

n. a decoration using cusps. [ WordNet 1.5 ]

n. [ Pg. cuspideria, fr. cuspir to spit. ] Any ornamental vessel used as a spittoon; hence, to avoid the common term, a spittoon of any sort. [ 1913 Webster ]

‖n. [ L. ] A point; a sharp end. [ 1913 Webster ]

a. [ See Multi-, and Cuspid. ] Multicuspidate; -- said of teeth. [ 1913 Webster ]

a. [ Multi- + cuspidate. ] Having many cusps or points. [ 1913 Webster ]

a. [ L. tricuspis, -idis; tri- (see Tri-) + cuspis a point: cf. F. tricuspide. ] 1. Having three cusps, or points; tricuspidate; as, a tricuspid molar. [ 1913 Webster ]

2. (Anat.) Of or pertaining to the tricuspid valves; as, tricuspid obstruction. [ 1913 Webster ]

Tricuspid valve (Anat.), the valve, consisting of three triangular membranous flaps, at the opening of the right auricle into the right ventricle in the heart of most mammals; -- sometimes called the tricuspid valves, each flap being regarded as a valve. [ 1913 Webster ]