The Collaborative International Dictionary of English v.0.48:

Mono \Mo"no\, n. [Sp.] (Zool.)
   The black howler (Mycetes villosus), a monkey of Central
   America.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mono- \Mon"o-\, Mon- \Mon-\ [Gr. ?.]
   A prefix signifying one, single, alone; as, monocarp,
   monopoly; (Chem.) indicating that a compound contains one
   atom, one radical, or one group of that to the name of which
   it is united; as, monoxide, monosulphide, monatomic, etc.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Monophonic \Mon`o*phon"ic\, a. [Mono- + Gr. ? a voice.]
   1. (Mus.) Single-voiced; having but one part; as, a
      monophonic composition; -- opposed to polyphonic.
      [1913 Webster]

   2. Of or relating to a system for recording and reproducing
      sound, which has only one sound channel; also called
      monaural or mono. It contrasts with stereophonic (or
      stereo), quadraphonic, or surround-sound, which have
      two or more channels, and can thus reproduce the effect of
      the sound coming from more than one direction.
      [PJC]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "mono":
   Gramophone, PA, PA system, Victrola, audio sound system,
   audiophile, binaural system, bitch box, bullhorn, cartridge,
   ceramic pickup, changer, crystal pickup,
   derived four-channel system, discrete four-channel system,
   four-channel stereo system, hi-fi, hi-fi fan, high-fidelity,
   intercom, intercommunication system, jukebox, magnetic pickup,
   monaural system, needle, nickelodeon, phonograph,
   photoelectric pickup, pickup, public-address system,
   quadraphonic sound system, radio-phonograph combination,
   record changer, record player, sound reproduction system,
   sound truck, squawk box, stereo, stylus, system, tape deck,
   tape recorder, tone arm, transcription turntable, turntable



U.S. Gazetteer Counties (2000):

Mono -- U.S. County in California
   Population (2000):    12853
   Housing Units (2000): 11757
   Land area (2000):     3044.398749 sq. miles (7884.956227 sq. km)
   Water area (2000):    87.401808 sq. miles (226.369633 sq. km)
   Total area (2000):    3131.800557 sq. miles (8111.325860 sq. km)
   Located within:       California (CA), FIPS 06
   Location:             37.853807 N, 118.961375 W
   Headwords:
    Mono
    Mono, CA
    Mono County
    Mono County, CA