[ noun ] a wooden plug forming a flue pipe (as the mouthpiece of a recorder) <noun.artifact>
Fipple \Fip"ple\ (f[~e]r), n. [perh. fr. L. fibula a clasp, a pin; cf. Prov. E. fible a stick used to stir pottage.] A stopper, as in a wind instrument of music. [Obs.] --Bacon.