countertenor

kontratenori adult male singer who uses head tone or falsetto to sing far higher than the typical male vocal range
male singing voice far higher than the typical male vocal range
(quote-journal) (Review)|date=8 August 2014|passage=The term countertenor first appeared in England during the mid 17th century. However, the style of singing originated in Elizabethan cathedral choirs, eventually falling out of favour during the Romantic period.
(Older) a part or section performing a countermelody against the tenor or main part