A hybrid of house music that originated in Detroit. It started to became popular in Europe in 1987-1988. It often used the Roland TB-303 synthesizer and had a 4/4 house beat. Many other styles such as Trance, Hardcore, and Gabber have evolved from Acid House.
It is said that the group Psychic TV first used the term "Acid House."
Many ravers don't realize that Trance music is an evolved version of Acid House.