embouchure
noun
em·bou·chure ˈäm-bü-ˌshu̇r 
ˌäm-bü-ˈshu̇r
1
: the position and use of the lips, tongue, and teeth in playing a wind instrument
2
: the mouthpiece of a musical instrument
Example Sentences
Recent Examples on the Web Furthermore, Armstrong’s all-encompassing embouchure also included his forehead and eyelids. 
Nr Editors, National Review, 6 Feb. 2020 Varying its pitch relies on the player’s embouchure – the employment of lips, facial muscles, tongue and teeth. George Castle, chicagotribune.com, 3 Sep. 2019
Nr Editors, National Review, 6 Feb. 2020 Varying its pitch relies on the player’s embouchure – the employment of lips, facial muscles, tongue and teeth. George Castle, chicagotribune.com, 3 Sep. 2019 Word History
Etymology
French, from (s')emboucher to flow into, from en- + bouche mouth — more at debouch
First Known Use
1760, in the meaning defined at sense 1
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