castrato

A male who has been castrated, especially a male whose testicles have been removed before puberty in order to retain his boyish voice.

A castrato stepped forward, a slender / young man with earnest grey eyes.

A male soprano or alto voice produced by castration of the treble singer before puberty, intended to conserve his voice; the singer.

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.

Castrated; especially castrated prepubescently.

Having, using or containing the voice of a castrato (noun).

Originally composed for a castrato.

Nowadays, either women or countertenors take the castrato roles.