A transverse flute or side-blown flute is a flute which is held horizontally when is played. The player blows across the embouchure hole, in a direction perpendicular to the flute's body length.
Transverse flutes include the Western classical flutes, the Indian classical flutes (the bansuri and the venu), the Chinese dizi, the Western fife, a number of Japanese fue, and Korean flutes such as Daegeum, Junggeum and Sogeum.
Humans perceive the pitch of a transverse flute at the amplified 2nd harmonic or more commonly, one octave above the produced fundamental.