hexode adjective & noun. 
['hɛksǝʊd] L19.[from HEXA- + -ODE2.]A. adjective.
1.  Designating a mode of telegraphy in which six messages can be sent simultaneously. 
L19.2.  Of a radio valve: having six electrodes. 
M20.b. noun. A radio valve with six electrodes. 
M20.  [TahlilGaran] English Dictionary ▲