accompanyist

from WordNet (r) 3.0 (2006)

accompanyist
    n 1: a person who provides musical accompaniment (usually on a
         piano) [syn: {accompanist}, {accompanyist}]

from The Collaborative International Dictionary of English v.0.48

accompanyist \accompanyist\ n.
   1. a person who provides musical accompaniment (usually on a
      piano).

   Syn: accompanist
        [WordNet 1.5]

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