Bocardo
Bocardo ({not transcribed}) , noun
[A mnemonic word.]
1.
(Logic) A form of syllogism of which the first and third propositions are particular negatives, and the middle term a universal affirmative.
Baroko and Bocardo have been stumbling blocks to the logicians.
2.
A prison; -- originally the name of the old north gate in Oxford, which was used as a prison. [English] — Latimer