walk through: A full rehearsal including camera movements, but without actually filming or recording sound. Also called a dry run or stagger through.
wall sled: A lighting support for a lamp on a scenery flat within a set. (Colloq.)
wand: A hand-held barcode reader.
warble tone: A constant amplitude tone used in audio testing whose frequency varies between set limits, i.e. it is frequency modulated.
warm start: To reboot a system without turning off the power (compare cold start).
wash: A general flood of light covering the setting.
watt (W): SI unit of electrical power, equivalent to producing or expending one joule of energy per second or the power used when one ampere flows through a one ohm resistor. Named after the eighteenth century Scottish ...