neutering a male animal by removing the testicles

the deletion of objectionable parts from a literary work

surgical removal of the testes or ovaries ( usually to inhibit hormone secretion in cases of breast cancer in women or prostate cancer in men); " bilateral castration results in sterilization"

The act of castrating.

The act of emasculating.

For he found that, though, in thus separating the gland from its duct and so cutting off its external secretion, the action of the cells manufacturing that secretion was destroyed, the general effects upon the body were not those of castration. – The Glands Regulating Personality by Louis Berman, M.D.