clicker

noun

• The remote-control device used to change settings on a television set, VCR, or other electronic equipment.

  "We have a clicker for the TV, one for the VCR, one for the DVD player and another one that does it all."

• An electronic device used by individual students in the classroom to respond to multiple-choice questions, etc.
• A person who cuts out the uppers of shoes from pieces of leather using a flexible knife that clicks as it changes direction.
• A machine that cuts materials using a steel rule die. The name comes from the sound (click) when the material is cut. May be hand, pneumatic, or hydraulic powered.
• A signalling device used by military forces. Pressed between thumb and fingers, it makes a small but distinctive click understood by other members of a unit.
• A small mechanical device that produces a clicking sound, used in dog training.
• Someone who clicks, for example using a computer mouse.
• One who stands before a shop door to invite people to buy.
• One who has charge of the work of a companionship.
• An employee who locks the type in the form to make it ready for printing.