[1] : The Collaborative International Dictionary of English v.0.48

viola \vi"ola\, n. it. see viol. mus.
   an instrument in form and use resembling the violin, but
   larger, and a fifth lower in compass.
   1913 webster

   viola da braccio it., viol for the arm, the tenor viol,
      or viola, a fifth lower than the violin. its part is
      written in the alto clef, hence it is sometimes called the
      alto.

   viola da gamba it., viol for the leg, an instrument
      resembling the viola, but larger, and held between the
      knees. it is now rarely used.

   viola da spalla it., viol for the shoulder, an instrument
      formerly used, resembling the viola, and intermediate in
      size between the viola and the viola da gamba.

   viola di amore it., viol of love: cf. f. viole d'amour, a
      viol, larger than the viola, having catgut strings upon,
      and brass or steel wires under, the keyboard. these,
      sounding sympathetically with the strings, yield a
      peculiarly soft and silvery sound. it is now seldom used.
      1913 webster
see also:
viol viola da braccio alto viola da gamba viola da spalla viola di amore 

[2] : The Collaborative International Dictionary of English v.0.48

alto \al"to\, n.; pl. altos. it. alto high, fr. l. altus. cf.
   alt.
   1. mus. formerly the part sung by the highest male, or
      counter-tenor, voices; now the part sung by the lowest
      female, or contralto, voices, between in tenor and
      soprano. in instrumental music it now signifies the tenor.
      1913 webster

   2. an alto singer.
      1913 webster

   alto clef mus. the counter-tenor clef, or the c clef,
      placed so that the two strokes include the middle line of
      the staff. --moore.
      1913 webster
see also:
altos alt alto clef 

[3] : The Collaborative International Dictionary of English v.0.48

high-pitched \high-pitched\ adj.
   1. high in pitch or frequency; -- used of sounds and voices.
      opposite of low. narrower terms: adenoidal, pinched,
      nasal; altissimo; alto; countertenor, alto;
      falsetto; peaky, spiky; piping; shrill, sharp;
      screaky, screechy, squeaking, squeaky, squealing;
      soprano, treble; sopranino; tenor

   syn: high.
        wordnet 1.5

   2. set at a sharp or high angle or slant; as, a high-pitched
      roof.

   syn: steeply pitched, steep.
        wordnet 1.5 high-power
see also:
low adenoidal, pinched, nasal altissimo alto countertenor, alto falsetto 
peaky, spiky piping shrill, sharp screaky, screechy, squeaking, squeaky, squealing soprano, treble 
sopranino tenor 

[4] : WordNet (r) 2.0

alto
     adj 1: of or being the lowest female voice syn: contralto
     2: of or being the highest male voice; having a range above
        that of tenor syn: countertenor
     3: of a musical instrument second highest member of a group;
        "alto clarinet or recorder"
     n 1: a singer whose voice lies in the alto clef
     2: the lowest female singing voice syn: contralto
     3: the highest adult male singing voice syn: countertenor
     4: the pitch range of the lowest female voice
see also:
contralto countertenor 

[5] : Moby Thesaurus II by Grady Ward, 1.0

76 moby thesaurus words for "alto":
   heldentenor, meistersinger, accompaniment, aria singer, baritenor,
   baritone, bass, basso, basso buffo, basso cantante, basso continuo,
   basso ostinato, basso profundo, bassus, blues singer, canary,
   cantatrice, canto, cantor, cantus, cantus figuratus, cantus planus,
   caroler, chanter, chantress, coloratura soprano, comic bass,
   continuo, contralto, countertenor, crooner, deep bass, descant,
   diva, dramatic soprano, drone, falsetto, figured bass, ground bass,
   head register, head tone, head voice, heroic tenor, hymner,
   improvisator, lead singer, lieder singer, line, male alto,
   melodist, mezzo-soprano, opera singer, part, plain chant,
   plain song, prick song, prima donna, psalm singer,
   rock-and-roll singer, singer, singstress, songbird, songster,
   songstress, soprano, tenor, thorough bass, torch singer, treble,
   undersong, vocalist, vocalizer, voice, voice part, warbler,
   yodeler

[6] : U.S. Gazetteer (1990)

alto, ga town, fips 1948
  location: 34.46744 n, 83.57448 w
  population 1990: 651 245 housing units
  area: 2.1 sq km land, 0.0 sq km water
  zip codes: 30510
alto, la
  zip codes: 71269
alto, mi
  zip codes: 49302
alto, tx town, fips 2188
  location: 31.65044 n, 95.07086 w
  population 1990: 1027 486 housing units
  area: 4.2 sq km land, 0.0 sq km water

[7] : U.S. Gazetteer Places (2000)

alto, ga -- u.s. town in georgia
   population 2000:    876
   housing units 2000: 325
   land area 2000:     0.825495 sq. miles 2.138023 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    0.825495 sq. miles 2.138023 sq. km
   fips code:            01948
   located within:       georgia ga, fips 13
   location:             34.466531 n, 83.573820 w
   zip codes 1990:     30510
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    alto, ga
    alto

[8] : U.S. Gazetteer Places (2000)

alto, tx -- u.s. town in texas
   population 2000:    1190
   housing units 2000: 534
   land area 2000:     1.682909 sq. miles 4.358713 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    1.682909 sq. miles 4.358713 sq. km
   fips code:            02188
   located within:       texas tx, fips 48
   location:             31.650131 n, 95.073810 w
   zip codes 1990:    
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    alto, tx
    alto

Alto >> A Words
Alto, definition of term: Alto
alto_pag1.html

Palo Alto >> P Words
Palo Alto, definition of term: Palo Alto
palo+alto_pag1.html