Castrato
/kæsˈtɹɑː.təʊ/
"Castrato" in a Sentence (3 examples)
A castrato stepped forward, a slender / young man with earnest grey eyes.
As contexts shift, so does generational taste. Just ask the castrati – the high-voiced boy singers displaced when Enlightenment liberalism restored female performers to the stage.
Nowadays, either women or countertenors take the castrato roles.