Definition of melophone in US English:

melophone

(also mélophone)

noun

Music
historical
  • Any of various kinds of accordion, especially one shaped like a guitar or cello and designed to be held on the player's lap.

Origin

Mid 19th century; earliest use found in Daily Atlas_ (Boston). Probably from French mélophone from mélo- + -phone.

Pronunciation

melophone

/ˈmɛləfəʊn/