trombone

A musical instrument in the brass family, having a cylindrical bore, and usually a sliding tube (but sometimes piston valves, and rarely both). Most often refers to the tenor trombone, which is the most common type of trombone and has a fun

Jim plays the trombone very well.

This trombone is very expensive.

The common European bittern.

A kind of extendable support for attaching lighting elements to a set.

The trombone […] permits an instrument to be positioned over a studio set wall, enabling the set wall to support the weight of the instrument.

The two secondary controls are the trombone handle and the focus knob.

To transmit a signal or data back to a central switching point before sending it out to its destination.

To extend and retract (the zoom lens); to use it too enthusiastically.

[…] do things wrong (like rotating the lens turret while shooting or backwinding and doing multiple passes on the same strip of film or doing in-camera fades with the variable shutter or tromboning a zoom lens like a teenager on acid, etc., etc., etc.) […]

He recalls (email to editor, 2 December 2012) that Durgnat 'shouted out' in response to his 'tromboning' the zoom-lens at the film's 1967 London Film Festival screening: […]