The Collaborative International Dictionary of English v.0.48:

Cello \Cel"lo\ (ch[e^]l"l[-o]), n.; pl. E. Cellos
   (ch[e^]l"l[-o]z), It. Celli (ch[e^]l"l[=e]).
   A contraction for Violoncello.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cello
    n 1: a large stringed instrument; seated player holds it upright
         while playing [syn: cello, violoncello]

Moby Thesaurus II by Grady Ward, 1.0:

97 Moby Thesaurus words for "cello":
   A string, Amati, Cremona, D string, E string, English horn,
   G string, Strad, Stradivari, Stradivarius, bass, bass viol,
   bassoon, block flute, bombard, bourdon, bow, bridge, bull fiddle,
   claribel, clarinet, clarion, concert flute, contrabass, cornet,
   cornopean, cromorna, crowd, cymbel, diapason, double bass,
   dulciana, fiddle, fiddlebow, fiddlestick, fingerboard, flute stop,
   foundation stop, fourniture, gamba, gedeckt, gemshorn,
   harmonic flute, hybrid stop, kit, kit fiddle, kit violin,
   koppel flute, larigot, melodia, mixture, mutation stop, nazard,
   oboe, octave, organ stop, piccolo, plein jeu, posaune, principal,
   quint, quintaten, rank, ranket, reed stop, register, rohr flute,
   scroll, sesquialtera, shawm, soundboard, spitz flute, stop,
   stopped diapason, stopped flute, string, string diapason,
   string stop, tenor violin, tierce, tremolo, trombone, trumpet,
   tuning peg, twelfth, unda maris, vibrato, viola, violin,
   violinette, violoncello, violoncello piccolo, violone, violotta,
   voix celeste, vox angelica, vox humana



The Free On-line Dictionary of Computing (30 December 2018):

Cello

    A web browser client for IBM PCs.  Runs under
   Microsoft Windows.

   (2014-08-23)