EMBOUCHURE

mouthpiece, embouchure

(noun) the aperture of a wind instrument into which the player blows directly

Source: WordNet® 3.1

Etymology

Noun

embouchure (countable and uncountable, plural embouchures)

(music) The use of the lips, facial muscles, tongue, and teeth when playing a wind instrument.

(archaic) The mouth of a river or valley.

Source: Wiktionary

Em`bou`chure", n. Etym: [F., fr. emboucher to put to the mouth; pref. em- (L. in) + bouche the mouth. Cf. Embouge, Debouch.]

1. The mouth of a river; also, the mouth of a cannon.

2. (Mus.) (a) The mouthpiece of a wind instrument. (b) The shaping of the lips to the mouthpiece; as, a flute player has a good embouchure.

Source: Webster’s Unabridged Dictionary 1913 Edition