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ungula

Origin: L, a claw, hoof, from unguis a nail, claw, hoof.

1. A hoof, claw, or talon.

2. (Science: geometry) 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. (Science: botany) same as unguis.

(Science: geometry) 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.