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tape_measure

The terms anode and cathode are reversed. Mnemonic device:

Anode - ants - bad - negative

Cathode - cats - good - positive

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This is the opposite of what I understand: anode positive, cathode negative.

Google (and multiple other sources) confirm my understanding:

  an·ode /ˈanōd/ the positively charged electrode by which the electrons leave a device.
  cath·ode /ˈkaTHˌōd/ the negatively charged electrode by which electrons enter an electrical device.

left hand side of the road, or right hand side of the road?

You've lost me.

Different domains have different conventions, regardless of what may be in a definitive reference.

obligatory xkcd https://xkcd.com/567/

It depends on whether you're talking about electron flow or conventional current, because they're opposite each other. The original mnemonic is incomplete because it doesn't specify to which it refers.

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