Function: noun
Date: 1898
: an electron tube which contains gas or vapor at low pressure and through which conduction takes place when a high voltage is applied
Function: noun
Date: 1898
: an electron tube which contains gas or vapor at low pressure and through which conduction takes place when a high voltage is applied
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012