glassichord

noun3

1. •
   A 19th-century musical instrument made of glass plates that are struck by hammers or sticks.

   • Amongst other phenomena, let it be remembered that the glassichord and the drum were skilfully played upon with both sticks. — 1870
2. •
   Synonym of glass harmonica.

   • He revived and improved the harmonica, or glassichord, and extended his speculations to the finer arts; showing that he could taste and criticise even the compositions of a Handel! — 1879
3. •
   (figurative) Anything that produces a similarly pure continuous sound.

   • The moveless, still air acted as a glassichord on the waters, which rang under the shrill voice of the singer. — 1867