neutered

from WordNet (r) 3.0 (2006)

neutered
    adj 1: having testicles or ovaries removed [syn: {altered},
           {neutered}]

from The Collaborative International Dictionary of English v.0.48

neutered \neutered\ adj.
   Deprived of sexual capacity or sexual attributes.

   Syn: altered, castrated, unsexed, fixed, apayed, desexed.
        [WordNet 1.5]