noun (n)

• the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body(noun.body)

  Synonym:
  heart, pump
  

  source: wordnet30
• a small portable timepiece(noun.artifact)

  Synonym:
  watch
  

  source: wordnet30
• a character printer that automatically prints stock quotations on ticker tape(noun.artifact)

  Synonym:
  stock ticker
  

  source: wordnet30
• One who, or that which, ticks, or produces a ticking sound, as a watch or clock, a telegraphic sounder, etc.(noun)

  source: webster1913
• A telegraphic receiving instrument that automatically prints off stock quotations (stock ticker) and other news on a paper ribbon or "tape."(noun)

  source: webster1913