"To castrate a male" means to surgically remove or disable his testicles, which are responsible for producing sperm and certain hormones, generally resulting in sterility and decreased sexual characteristics. Full definition
In this study, the authors examined the effects of sex hormones on systematic and renal hemodynamic parameters, mean arterial pressure, renal cortical flow and renal medullary blood flow in castrated male and spayed female diabetic rats, compared with sham - operated animals. (academic.oup.com)
However, by the 13th Century, the term «bellwether» had become synonymous with «wether,» and both referred to the poor, castrated male sheep. (lawyerist.com)
By providing a very inexpensive way of castrating male dogs and cats (under $ 1.00 per animal) more resources can be used to provide these necessary surgeries. (calciumchloridecastration.com)