Crossword Genius

Negative terminal (7)

Ross

I believe the answer is:

cathode

'negative terminal' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for cathode that I've seen before include "Conductor by which electricity leaves a device" , "Negatively charged terminal" , "Negative terminal" , "Electrical terminal" , "Positive terminal of a primary cell" .)

I've seen this clue in the Universal, The Sun and The Times.
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