the shape of the mouth when playing a wind instrument 置唇法（吹奏管乐器时的口型） the mouthpiece of a flute （长笛的）吹口
Word Originmid 18th cent.: French, from s'emboucher ‘discharge itself by the mouth’, from emboucher ‘put in or to the mouth’, from em- ‘into’ + bouche ‘mouth’.