Definitions for "Fipple"
a wooden plug forming a flue pipe (as the mouthpiece of a recorder)
Fipple mouthpieces are commonly found on end-blown woodwind instruments such as the tin whistle and the recorder. They use a narrow windway and a blade-like edge to channel and vibrate air blown into them.
Keywords:  labium, block
Either the block or the labium
Keywords:  stopper, music, wind, instrument
A stopper, as in a wind instrument of music.