definition of
ticker

[1] #1 ticker n. [heart, pump] the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body; "he stood still, his heart thumping wildly". wn

[2] #2 ticker n. [watch] a small portable timepiece. wn

[3] #3 ticker n. [stock ticker] a character printer that automatically prints stock quotations on ticker tape. wn