MOUTHPIECE
mouthpiece, embouchure
(noun) the aperture of a wind instrument into which the player blows directly
mouthpiece
(noun) the tube of a pipe or cigarette holder that a smoker holds in the mouth
mouthpiece
(noun) an acoustic device; the part of a telephone into which a person speaks
mouthpiece, gumshield
(noun) (especially boxing) equipment that protects an athlete’s mouth
mouthpiece
(noun) a part that goes over or into the mouth of a person; “the mouthpiece of a respirator”
mouthpiece, mouth
(noun) a spokesperson (as a lawyer)
Source: WordNet® 3.1
Etymology
Noun
mouthpiece (plural mouthpieces)
A part of any device that functions in or near the mouth, especially
The part of a telephone that is held close to the mouth.
The part of a wind instrument that is held in or against the mouth.
A spokesman; one who speaks on behalf of someone else.
(slang) A lawyer for the defense.
Source: Wiktionary
Mouth"piece`, n.
1. The part of a musical or other instrument to which the mouth is
applied in using it; as, the mouthpiece of a bugle, or of a tobacco
pipe.
2. An appendage to an inlet or outlet opening of a pipe or vessel, to
direct or facilitate the inflow or outflow of a fluid.
3. One who delivers the opinion of others or of another; a spokesman;
as, the mouthpiece of his party.
Egmont was imprudent enough to make himself the mouthpiece of their
remonstrance. Motley.
Source: Webster’s Unabridged Dictionary 1913 Edition