滑音

In music, portamento (: portamenti; from old , meaning 'carriage' or 'carrying'), also known by its French name glissade, is a pitch sliding from one note to another. The term originated from the Italian expression ('carriage of the voice'), denoting from the beginning of the 17th century its use in vocal performances and emulation by members of the violin family and certain wind instruments, and is sometimes used interchangeably with anticipation. It is also applied to one type of glissando on, e.g., slide trombones, as well as to the "glide" function of steel guitars and synthesizers.