clicker

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One that clicks, as.
• noun A remote control, as for a television or DVD player.
• noun A computer mouse.
• noun A mechanical counter.

from The Century Dictionary.

• noun Same as click, 3.
• noun A person employed by a shopkeeper to stand at the door and solicit custom.
• noun In shoemaking, one who cuts out leather for the uppers and soles of boots and shoes.
• noun In printing, as formerly and still sometimes conducted, the compositor who receives the copy of a work and distributes it among the other compositors, makes up the pages, and sets up head-lines, etc.; the leader of a companionship of typesetters.

from the GNU version of the Collaborative International Dictionary of English.

• noun Low, Eng. One who stands before a shop door to invite people to buy.
• noun (Print.) One who as has charge of the work of a companionship.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun slang The remote-control device used to change settings on a television set, VCR, or other electronic equipment.
• noun A person who cuts out the uppers of shoes from pieces of leather using a flexible knife that clicks as it changes direction.
• noun 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.
• noun 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.
• noun A small mechanical device that produces a clicking sound, used in dog training.
• noun Someone who clicks, for example on internet hyperlinks.
• noun obsolete, UK One who stands before a shop door to invite people to buy.
• noun obsolete, printing One who has charge of the work of a companionship.