From Longman Dictionary of Contemporary Englishcastratecas‧trate /kæˈstreɪt $ ˈkæstreɪt/ verb [transitive] MHHBAto remove the testicles of a male animal or a man —castration /kæˈstreɪʃən/ noun [uncountable]→ See Verb table
Examples from the Corpus
castrate• One of the young man's eyes had been gouged out and he had been castrated.• The guide picked up the rifle, shot and castrated him, and made off.• Store boss James Andrews was warned his sons would be castrated if he did not get the ransom.• In many such cases, vets often castrate the apparent aggressor, but this invariably makes matter a lot worse.• He had apparently adopted the Danakil custom of castrating the dead and dying.• The farmer may castrate the excess bulls, creating steers, or slaughter them.• Every two or three years the family organises a festival for branding the calves and castrating the young bulls.Origin castrate (1400-1500) Latin past participle of castrare 