- The movable metal tube of a trombone which lengthens or shortens the tubing of the instrument, thus changing the fundamental and harmonic series of the instrument, enabling it to hit each chromatic note of its range.
- A rapid run of notes, without differentiating or accenting each of the intermediate notes. See glissando.
- An ornamentation of two accessory notes, when performed upwards it is called an "elevation", when downwards, a "double backfall" or a "slur".
- The small movable metal tube(s) of a brass instrument which lengthens or shortens the tubing of the instrument, thus changing the pitch to bring the instrument, in tune with other instruments in an ensemble. Typically, there is a slide associated with each valve, so they can be tuned individually. Pulling a slide out (or making the tubing longer) will lower the pitch or make the pitch flatter. Pushing a slide in (or making the tubing shorter) will raise the pitch or make the pitch sharper.
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