mouthpiece [mouthpieces]◼◼◼(part of a wind or brass instrument) noun [UK: ˈmaʊθ.piːs] [US: ˈmaʊθ.ˌpis]I can't find my trumpet mouthpiece. = Je ne trouve pas l'embouchure de ma trompette.
embouchure [embouchures]◼◼◼(use of the lips, facial muscles, tongue, and teeth when playing a wind instrument) noun [UK: ˌɒm.bʊ.ˈʃʊə] [US: ˌɑːm.bʊ.ˈʃʊr]