Contralto /(? [or] )/

Con·tral·to

Contralto

n.
  1. The part sung by the highest male or lowest female voices; the alto or counter tenor. (Mus.)

Contralto

a.
  1. Of or pertaining to a contralto, or to the part in music called contralto; as, a contralto voice. (Mus.)