contralto
 oxford
 views  updated May 23 2018con·tral·to  / kənˈtraltō/ •
n. (pl.  -tos) the lowest female singing voice. ∎  a singer with such a voice. ∎  a part written for such a voice.
 The Oxford Pocket Dictionary of Current English 
   contralto
 oxford
 views  updated May 21 2018contralto Lowest range (below 
soprano and 
mezzo-soprano) of the female singing voice. A male voice in this range is called a 
countertenor. See also 
alto  World Encyclopedia 
   contralto
 oxford
 views  updated May 29 2018contralto XVIII (earlier 
contrealt). — It., f. 
CONTRA- and 
ALTO.
  The Concise Oxford Dictionary of English Etymology T. F. HOAD
   contralto
 oxford
 views  updated May 21 2018contralto (It.). The lowest of the ranges of female v., with a normal range g–g″. Originally term meant a male singer, falsetto or castrato, being derived from ‘contr’ alto', abbrev. of contratenor altus.
  The Concise Oxford Dictionary of Music MICHAEL KENNEDY and JOYCE BOURNE