Talking about
CRTs, I beleieve across the Pond, the electodes are called
'cathode', 'grid 1', 'grid 2'.... 'anode'. Over here
they're 'cathode'
'grid'. 'anode 1' (or 'first anode'), 'anode 2'
('second anode')... (the
last one, the aquadaq coating inside the flare, connected to the EHT
supply, is called the 'final anode' most of the time).
Usually the grid is called Wehnelt cylinder because of its inventor and
its shape.
Although I've seen that term in books in the UK, it's not common (and I
don't think I'ev seen a service manual, as opposed to a book on design,
that uses it). In the UK it's normally just called the 'grid' or 'control
grid'
-tony