ticker

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

• noun A telegraphic instrument that receives news reports and prints them on paper tape.
• noun Any of various devices that receive and display similar information, such as stock market quotations, electronically.
• noun Slang A watch.
• noun Slang The heart.

from The Century Dictionary.

• noun Something which ticks, or makes a slight repeated sound.
• noun A telegraphic instrument, especially a stock indicator (which see, under indicator).
• noun A cribbing horse.

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

• noun One who, or that which, ticks, or produces a ticking sound, as a watch or clock, a telegraphic sounder, etc.
• noun A telegraphic receiving instrument that automatically prints off stock quotations (stock ticker), market report, or other news on a paper ribbon or “tape.”
• noun an electronic instrument receiving information by transmision from a remote source and displaying it in readable fashion, not necessarily on paper tape (e.g. on a video display terminal or moving ribbon of electronically controlled lights).
• noun colloq. The heart.

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

• noun A measuring or reporting device, particularly one which makes a ticking sound as the measured events occur.
• noun A stock ticker.
• noun A news ticker.
• noun colloquial The heart.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a small portable timepiece
• noun a character printer that automatically prints stock quotations on ticker tape
• noun the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body