The bouzouki (, also US: ; Greek: μπουζούκι [buˈzuki]; alt. pl. bouzoukia, from Greek μπουζούκια), also spelled buzuki or buzuci, is a musical instrument popular in Greece. It is a member of the long-necked lute family, with a round body with a flat top and a long neck with a fretted fingerboard. It has steel strings and is played with a plectrum producing a sharp metallic sound, reminiscent of a mandolin but pitched lower. There are two main types of bouzouki: the trichordo (three-course) has three pairs of strings (known as courses) and the tetrachordo (four-course) has four pairs of strings. The instrument was brought to Greece in the early 1900s by Greek refugees from Anatolia, and quickly became the central instrument to the rebetiko genre and its music branches. It is now an important element of modern Laïko pop Greek music.