harmoniums

/HH AA0 R M OW1 N IY0 AH0 M Z/
noun
  1. 1

    A small keyboard instrument that consists of a series of reed pipes, which sound when one of the keys is pressed to open a valve that allows air to pass through.

Source: https://en.wiktionary.org/wiki/harmonium, https://en.wiktionary.org/wiki/harmoniums