A reed organ is a type of musical instrument that produces sound by blowing air through a series of metal or wooden reeds. It is also known as a pump organ or harmonium. The reed organ is similar to a piano in that it has a keyboard, but instead of producing sound by striking strings, it creates notes by pumping air through reeds. Some synonyms for the reed organ are melodeon, harmoniflute, regal, and American organ. These instruments were popular in the 19th century and were used in churches and homes for musical entertainment. Today, reed organs are still played and appreciated by enthusiasts around the world.