Ungula

n.	1.	A hoof, claw, or talon.
	2.	(Geom.) A section or part of a cylinder, cone, or other solid of revolution, cut off by a plane oblique to the base; - so called from its resemblance to the hoof of a horse.
	3.	(Bot.) Same as Unguis, 3. Spherical ungula (Geom.) a part of a sphere bounded by two planes intersecting in a diameter and by a line of the surface of the sphere.