baritone

Concise Oxford English Dictionary © 2008 Oxford University Press:
baritone/ˈbarɪtəʊn/

▶noun

• 1 an adult male singing voice between tenor and bass.

• 2 [as modifier] denoting an instrument that is second lowest in pitch in its family.

– derivatives
baritonal adjective.

– origin C17: from Ital. baritono, from Gk barutonos, from barus ‘heavy’ + tonos (see tone).