sex change
noun [ C, usually singular ] uk/ˈseks ˌtʃeɪndʒ/ us/ˈseks ˌtʃeɪndʒ/
变性手术
an operation that, together with hormone treatment, gives a man many of the characteristics of a woman, or a woman many of the characteristics of a man
[ before noun ] a sex-change operation 变形手术