gelding

n. castrated male animal (especially a horse)

v. castrate an animal (especially a horse)

A gelding is a castrated animal — in English, the term specifically refers to a castrated male  horse or other equine. The word comes from the Old Norse geldr ("barren"). Castration, and the elimination of hormonally-driven behavior associated with a stallion allows a male horse to be calmer and better-behaved, making the animal quieter, gentler and potentially more suitable as an everyday working animal.
See more at Wikipedia.org...

n. validity, state of being valid, legitimacy

(v. t.)
A castrated animal; -- usually applied to a horse, but formerly used also of the human male.
  

(p. pr. a. & vb. n.)
from Geld, v. t.
  

(p. pr. & vb. n.)
of Geld
  

Noun
1. castrated male horse
(hypernym) male horse
(derivation) geld, cut

Verb
1. cut off the testicles (of male animals such as horses); "the vet gelded the young horse"
(synonym) cut
(hypernym) emasculate, castrate, demasculinize, demasculinise
(derivation) gelding