D defs.my
Entry 2 senses Webster, 1913

Melodeon

· Me·lo·de·on · IPA /məˈloʊdi.ən/
01 n. A kind of small reed organ; -- a portable form of the seraphine.
  1. 1.
    A kind of small reed organ; -- a portable form of the seraphine.(Mus.)
  2. 2.
    A music hall.