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1.
One who, or that which, ticks, or produces a ticking sound, as a watch or clock, a telegraphic sounder, etc.
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2.
A telegraphic receiving instrument that automatically prints off stock quotations (stock ticker), market report, or other news on a paper ribbon or “tape.” Also: <col>stock ticker</col>
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3.
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).
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4.