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digitron

noun
  1. electronics a type of tube, for displaying information, having a common anode and several cathodes shaped in the form of characters, which can be lit by a glow dischargeAlso called: Nixie tube
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Word Origin

C20: from digit + -tron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012