Ticker \Tick"er\, n. A telegraphic receiving instrument that automatically prints off stock quotations (stock ticker) and other news on a paper ribbon or ``tape.''
Source: Webster's Revised Unabridged Dictionary (1913)
Ticker \Tick"er\, n. [See Tick.] One who, or that which, ticks, or produces a ticking sound, as a watch or clock, a telegraphic sounder, etc.