Nixie tube noun phr. ['nɪksɪ tju:b] Also 
nixie tube. 
M20.[from numeric indicator experimental (number) 1: see -IE.]A numerical indicator used in scientific instruments, consisting of a gas-discharge bulb containing ten cathodes bent into the shapes of numerals.
►  Proprietary name in the US. 
 [TahlilGaran] English Dictionary ▲