\Un"gu*la\, n.; pl. {Ungul[ae]}. [L., a claw, hoof, from
unguis a nail, claw, hoof.]
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.