Ungula /(?)/

Un·gu·la

Ungula

n.

pl. Ungulae

  1. A hoof, claw, or talon.
  2. 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. (Geom.)
  3. Same as Unguis, 3. (Bot.)

Phrases & Compounds
Spherical ungula
a part of a sphere bounded by two planes intersecting in a diameter and by a line of the surface of the sphere.